{"title":"EMI Thunder Exhaust - Big Block Chevy","description":"\u003cp\u003e\u003cspan\u003eEddie Marine engine exhaust systems and the home of the EMI Thunder Exhaust, Cast aluminum manifolds and risers for your Big Block Chevy. Every EMI Thunder Exhaust System is made and assembled in Southern California, USA\u003c\/span\u003e\u003c\/p\u003e","products":[{"product_id":"emi-thunder-exhaust-system-bb-chevy-with-high-perf-ss-risers","title":"EMI Thunder Exhaust System - BB Chevy with High Perf SS Risers","description":"\u003cdiv\u003e\u003cb\u003e\u003cspan\u003eEquipped with our performance Stainless Steel High Flow Risers, these are our best performing systems. EMI Thunder exhaust systems are a direct replacement for many stock Mercruiser manifolds in Bravo and Alpha applications with exhaust outlets in the stock location (if you have existing exhaust outlets, please check our dimensions to determine the correct fit before ordering! We are not responsible for exhaust systems that do not match up to existing holes in your boat's transom). The 16\" long riser on these systems is a must with High Performance camshafts to prevent reversion (water ingestion). NOTE: Engines using larger than stock, aftermarket camshafts may require a dry tailpipe system to prevent reversion. Provide us with your camshaft's lope separation angle and duration at .050\" before choosing an exhaust system! These longer risers WILL NOT work with Selector systems or stock \"S\" pipe connections. Brackets to keep all of the stock components in their existing locations (shift quadrant, ignition module and oil filter bracket) are available and sold separately.\u003c\/span\u003e\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e\u003c\/b\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003eFeatures:\u003c\/b\u003e\u003cbr\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003e\u003c\/b\u003eLarge individual runners for ultra-efficient exhaust flow and velocity\u003c\/li\u003e\n\u003cli\u003eDirect replacement for many stock Mercruiser manifolds in Bravo \u0026amp; Alpha apps\u003cbr\u003e\u003ci\u003e\u003cspan\u003e*See our systems dimensions in the Technical Specs below to confirm fitment.\u003c\/span\u003e\u003c\/i\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMinimum 10% increase in torque and horsepower\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e316 stainless steel investment cast, one-piece riser flange\/inner pipe\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eStandard 4” exhaust hose connections\u003c\/li\u003e\n\u003cli\u003eIntegral water-cooled exhaust divider\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e70lbs lighter than stock cast iron exhaust systems\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eFive year limited warranty\u003c\/li\u003e\n\u003cli\u003eConstructed from the highest strength 356 aluminum\u003c\/li\u003e\n\u003cli\u003eThree step coating process for ultimate corrosion resistance\u003c\/li\u003e\n\u003cli\u003eHeat treated to a T-6 condition\u003c\/li\u003e\n\u003cli\u003eMilitary specification Hard-Coat Anodize undercoat\u003c\/li\u003e\n\u003cli\u003eUltra-durable Gloss Black Fusioncoat Finish\u003c\/li\u003e\n\u003cli\u003eCustom Blue or Red Fusioncoat Finishes\u003cspan\u003e available\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003e\u003cb\u003eA Warranty Unlike Any Other!\u003c\/b\u003e\u003cbr\u003eAll EMI Thunder exhaust systems (except systems with a polished finish) come\u003cbr\u003ewith a limited 5 year warranty against defects and failure to the original owner!\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Eddie Marine","offers":[{"title":"Bright Polished Finish","offer_id":46892868632764,"sku":"EMI-511P","price":3830.95,"currency_code":"USD","in_stock":true},{"title":"Bright Blue Fusioncoat Finish","offer_id":46892868665532,"sku":"EMI-511B","price":3856.95,"currency_code":"USD","in_stock":true},{"title":"Gloss Black Fusioncoat Finish","offer_id":46892868698300,"sku":"EMI-511BK","price":3856.95,"currency_code":"USD","in_stock":true},{"title":"Bright Red Fusioncoat Finish","offer_id":46892868731068,"sku":"EMI-511R","price":3856.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0772\/8676\/8828\/files\/EMI-511_EMI_thunder_BB_chevy_exhaust_PNG_web.png?v=1780436635"},{"product_id":"emi-thunder-exhaust-system-bb-chevy-3-taller-risers","title":"EMI Thunder Exhaust System - BB Chevy +3\" Taller Risers","description":"\u003cdiv\u003e\u003cstrong\u003eEMI Thunder Exhaust System - BB Chevy +3\" Taller Risers\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cb\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/b\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eEquipped with our performance Stainless Steel High Flow Risers, these are our best performing systems. EMI Thunder exhaust systems are a direct replacement for many stock Mercruiser manifolds in Bravo and Alpha applications with exhaust outlets in the stock location ( if you have existing exhaust outlets, please check our dimensions to determine the correct fit before ordering! We are not responsible for exhaust systems that do not match up to existing holes in your boat's transom). The 16\" long riser is a must with High Performance camshafts to prevent reversion (water ingestion). NOTE: Engines using larger than stock, aftermarket camshafts may require a dry tailpipe system to prevent reversion. Provide us with your camshaft's lobe separation angle and duration at .050\" before choosing an exhaust system! These longer risers \u003c\/span\u003e\u003cb\u003eWILL NOT\u003c\/b\u003e\u003cspan\u003e work with Selector systems or stock \"S\" pipe connections. Brackets to keep all of the stock components in their existing locations (shift quadrant, ignition module and oil filter bracket) are available and sold separately.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e\u003c\/b\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e\u003c\/b\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003cp\u003e\u003cspan\u003e\u003cb\u003eA Warranty Unlike Any Other!\u003c\/b\u003e\u003cbr\u003eAll EMI Thunder exhaust systems (except systems with a polished finish) come\u003cbr\u003ewith a limited 5 year warranty against defects and failure to the original owner!\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Eddie Marine","offers":[{"title":"Bright Polished Finish","offer_id":46892884426940,"sku":"EMI-552P","price":3949.95,"currency_code":"USD","in_stock":true},{"title":"Bright Blue Fusioncoat Finish","offer_id":46892884459708,"sku":"EMI-552B","price":3974.95,"currency_code":"USD","in_stock":true},{"title":"Gloss Black Fusioncoat Finish","offer_id":46892884492476,"sku":"EMI-552BK","price":3822.95,"currency_code":"USD","in_stock":true},{"title":"Bright Red Fusioncoat Finish","offer_id":46892884525244,"sku":"EMI-552R","price":3974.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0772\/8676\/8828\/files\/EMI-552-2T.png?v=1780437383"},{"product_id":"emi-thunder-exhaust-system-bb-chevy-with-ss-hi-performance-dry-pipe","title":"EMI Thunder Exhaust System - BB Chevy with SS Hi Performance Dry Pipe","description":"\u003cdiv\u003e\u003cstrong\u003eEMI Thunder Exhaust System - BB Chevy with SS Hi Performance Dry Pipe\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eEquipped with our performance dry Stainless Steel High Flow Risers, these are our best performing systems. EMI Thunder exhaust systems are a direct replacement for many stock Mercruiser manifolds in Bravo and Alpha applications with exhaust outlets in the stock location ( if you have existing exhaust outlets, please check our dimensions to determine the correct fit before ordering! We are not responsible for exhaust systems that do not match up to existing holes in your boat's transom).The long dry risers on these systems area must with High Performance camshafts to prevent reversion (water ingestion). Standard length on these risers is 32\" but they are made to order and can be built to a custom length at no extra cost (unusually long applications may require an additional charge). For custom pipes provide us a mock PVC example showing length from your front cylinder head bolt to the end of the tailpipe (See Mock-up Example images) With dry risers, the engine discharge water and exhaust do not mix until the very end of the tailpipe, outside of the boat, reducing the chance of reversion. They will be quite a bit louder than a standard set of risers.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003cbr\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003e\u003c\/b\u003eLarge individual runners for ultra-efficient exhaust flow and velocity\u003c\/li\u003e\n\u003cli\u003eDirect replacement for many stock Mercruiser manifolds in Bravo \u0026amp; Alpha apps\u003cbr\u003e\u003ci\u003e\u003cspan\u003e*See our systems dimensions in the Technical Specs below to confirm fitment.\u003c\/span\u003e\u003c\/i\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMinimum 10% increase in torque and horsepower\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e316 stainless steel investment cast, one-piece riser flange\/inner pipe\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eStandard 4” exhaust hose connections\u003c\/li\u003e\n\u003cli\u003eIntegral water-cooled exhaust divider\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e70lbs lighter than stock cast iron exhaust systems\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eFive year limited warranty\u003c\/li\u003e\n\u003cli\u003eConstructed from the highest strength 356 aluminum\u003c\/li\u003e\n\u003cli\u003eThree step coating process for ultimate corrosion resistance\u003c\/li\u003e\n\u003cli\u003eHeat treated to a T-6 condition\u003c\/li\u003e\n\u003cli\u003eMilitary specification Hard-Coat Anodize undercoat\u003c\/li\u003e\n\u003cli\u003eUltra-durable  Fusioncoat Finishes \u003cspan\u003eavailable\u003c\/span\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cb\u003eSystem Includes:\u003cbr\u003e\u003c\/b\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003e\u003c\/b\u003e\u003cspan\u003e1pr. EMI Exhaust Manifolds\u003cbr\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003e1pr. Aluminum Risers\u003cbr\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eBolts, exhaust and riser gaskets, and fittings.\u003cbr\u003e\u003c\/span\u003e\u003ci\u003e* Accessory brackets are sold separately\u003c\/i\u003e\u003cspan\u003e.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\nEMI Thunder manifolds are hard coat anodized to a military spec throughout to prevent corrosion.\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eStandard with Black, Blue, and Red Fusioncoat finishes.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cb\u003e\u003ci\u003e*Not for use with engines equipped with high performance camshafts!\u003c\/i\u003e\u003c\/b\u003e\u003c\/div\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e\u003c\/b\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003cp\u003e\u003cspan\u003e\u003cb\u003eA Warranty Unlike Any Other!\u003c\/b\u003e\u003cbr\u003eAll EMI Thunder exhaust systems (except systems with a polished finish) come\u003cbr\u003ewith a limited 5 year warranty against defects and failure to the original owner!\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Eddie Marine","offers":[{"title":"Bright Polished Finish","offer_id":46892893962428,"sku":"EMI-513P","price":4357.95,"currency_code":"USD","in_stock":true},{"title":"Bright Blue Fusioncoat Finish","offer_id":46892893995196,"sku":"EMI-513B","price":4382.95,"currency_code":"USD","in_stock":true},{"title":"Gloss Black Fusioncoat Finish","offer_id":46892894027964,"sku":"EMI-513BK","price":4229.95,"currency_code":"USD","in_stock":true},{"title":"Bright Red Fusioncoat Finish","offer_id":46892894060732,"sku":"EMI-513R","price":4382.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0772\/8676\/8828\/files\/EMI-513-2T.png?v=1780437768"},{"product_id":"emi-thunder-exhaust-system-bb-chevy-with-ss-silent-choice-risers","title":"EMI Thunder Exhaust System - BB Chevy with SS Silent Choice Risers","description":"\u003cdiv\u003e\u003cstrong\u003eEMI Thunder Exhaust System - BB Chevy with SS Silent Choice Risers\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eEquipped with our short performance Stainless Steel High Flow Risers, these are our best performing systems. They are a direct replacement for many stock Mercruiser manifolds in Bravo and Alpha applications using exhaust selector systems or Merc \"S\" pipes \u003c\/span\u003e\u003ci\u003e( if you have existing exhaust outlets, please check our dimensions to determine the correct fit before ordering! We are not responsible for exhaust systems that do not match up to existing holes in your boat's transom)\u003c\/i\u003e\u003cspan\u003e. With this system with short Silent Choice risers, we \u003c\/span\u003e\u003cb\u003eDO NOT\u003c\/b\u003e\u003cspan\u003e recommended them for use with engines with aftermarket camshafts. Brackets to keep all of the stock components in their existing locations \u003c\/span\u003e\u003ci\u003e(shift quadrant, ignition module and oil filter bracket)\u003c\/i\u003e\u003cspan\u003e are available and sold separately.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003cbr\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003eLarge individual runners for ultra-efficient exhaust flow and velocity\u003c\/li\u003e\n\u003cli\u003eDirect replacement for many stock Mercruiser manifolds in Bravo \u0026amp; Alpha apps\u003cbr\u003e\u003ci\u003e\u003cspan\u003e*See our systems dimensions in the Technical Specs below to confirm fitment.\u003c\/span\u003e\u003c\/i\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMinimum 10% increase in torque and horsepower\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e316 stainless steel investment cast, one-piece riser flange\/inner pipe\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eStandard 4” exhaust hose connections\u003c\/li\u003e\n\u003cli\u003eIntegral water-cooled exhaust divider\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e70lbs lighter than stock cast iron exhaust systems\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eFive year limited warranty\u003c\/li\u003e\n\u003cli\u003eConstructed from the highest strength 356 aluminum\u003c\/li\u003e\n\u003cli\u003eThree step coating process for ultimate corrosion resistance\u003c\/li\u003e\n\u003cli\u003eHeat treated to a T-6 condition\u003c\/li\u003e\n\u003cli\u003eMilitary specification Hard-Coat Anodize undercoat\u003c\/li\u003e\n\u003cli\u003eUltra-durable Gloss Black Fusioncoat Finish\u003c\/li\u003e\n\u003cli\u003eCustom Blue or Red Fusioncoat Finishes\u003cspan\u003e available\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cb\u003eSystem Includes:\u003cbr\u003e\u003c\/b\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003e\u003c\/b\u003e\u003cspan\u003e1pr. EMI Exhaust Manifolds\u003cbr\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003e1pr. Aluminum Risers\u003cbr\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eBolts, exhaust and riser gaskets, and fittings.\u003cbr\u003e\u003c\/span\u003e\u003ci\u003e* Accessory brackets are sold separately\u003c\/i\u003e\u003cspan\u003e.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\nEMI Thunder manifolds are hard coat anodized to a military spec throughout to prevent corrosion.\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eStandard with Black, Blue, and Red Fusioncoat finishes.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cb\u003e\u003ci\u003e*Not for use with engines equipped with high performance camshafts!\u003c\/i\u003e\u003c\/b\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e\u003c\/b\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003cp\u003e\u003cspan\u003e\u003cb\u003eA Warranty Unlike Any Other!\u003c\/b\u003e\u003cbr\u003eAll EMI Thunder exhaust systems (except systems with a polished finish) come\u003cbr\u003ewith a limited 5 year warranty against defects and failure to the original owner!\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Eddie Marine","offers":[{"title":"Bright Polished Finish","offer_id":46892926632124,"sku":"EMI-512P","price":3830.95,"currency_code":"USD","in_stock":true},{"title":"Bright Blue Fusioncoat Finish","offer_id":46892926664892,"sku":"EMI-512B","price":3856.95,"currency_code":"USD","in_stock":true},{"title":"Gloss Black Fusioncoat Finish","offer_id":46892926697660,"sku":"EMI-512BK","price":3703.95,"currency_code":"USD","in_stock":true},{"title":"Bright Red Fusioncoat Finish","offer_id":46892926730428,"sku":"EMI-512R","price":3856.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0772\/8676\/8828\/files\/EMI-512P-2T.png?v=1780438454"},{"product_id":"emi-thunder-exhaust-system-bb-chevy-with-ss-hi-perf-s-pipe-kit-colored-finish","title":"EMI Thunder Exhaust System - BB Chevy with SS Hi Perf S - Pipe Kit","description":"\u003cdiv\u003e\n\u003cstrong\u003eEMI Thunder Exhaust System - BB Chevy with SS Hi Perf S - Pipe Kit \u003c\/strong\u003e\u003cb\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/b\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eEquipped with our performance Stainless Steel High Flow Risers, these are our best performing option for running your exhaust low, under your swim steps. EMI Thunder exhaust systems are a direct replacement for many stock Mercruiser manifolds in Bravo and Alpha applications with exhaust outlets in the stock location ( if you have existing exhaust outlets, please check our dimensions to determine the correct fit before ordering! We are not responsible for exhaust systems that do not match up to existing holes in your boat's transom). The long \"S\" risers on these systemsnot only get the exhaust low but they are ideal for engines equipped withHigh Performance camshafts to prevent reversion (water ingestion). NOTE: Engines using larger than stock, aftermarket camshafts may require a dry tailpipe system to prevent reversion. Provide us with your camshaft's lope separation angle and duration at .050\"before choosing an exhaust system!These longer risers WILL NOT work with Selector systems or stock \"S\" pipe connections. Brackets to keep all of the stock componenets in their existing locations (shift quadrant, ignition module and oil filter bracket) are available and sold separately.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003cb\u003eFeatures \u003cbr\u003e\u003c\/b\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003eDirect replacement for many stock Mercruiser manifolds in Bravo \u0026amp; Alpha apps\u003cbr\u003e\u003ci\u003e\u003cspan\u003e*See our systems dimensions in the Technical Specs below to confirm fitment.\u003c\/span\u003e\u003c\/i\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ci\u003e\u003cspan\u003e\u003cb\u003eLarge individual runners for ultra-efficient exhaust flow and velocity\u003c\/b\u003e\u003c\/span\u003e\u003c\/i\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMinimum 10% increase in torque and horsepower\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e316 stainless steel investment cast, one-piece riser flange\/inner pipe\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eStandard 4” exhaust hose connections\u003c\/li\u003e\n\u003cli\u003eIntegral water-cooled exhaust divider\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e70lbs lighter than stock cast iron exhaust systems\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eFive year limited warranty\u003c\/li\u003e\n\u003cli\u003eConstructed from the highest strength 356 aluminum\u003c\/li\u003e\n\u003cli\u003eThree step coating process for ultimate corrosion resistance\u003c\/li\u003e\n\u003cli\u003eHeat treated to a T-6 condition\u003c\/li\u003e\n\u003cli\u003eMilitary specification Hard-Coat Anodize undercoat\u003c\/li\u003e\n\u003cli\u003eUltra-durable Fusioncoat Finishes\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cb\u003eSystem Includes:\u003cbr\u003e\u003c\/b\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003e\u003c\/b\u003e\u003cspan\u003e1pr. EMI Exhaust Manifolds\u003cbr\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003e1pr. Aluminum Risers\u003cbr\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eBolts, exhaust and riser gaskets, and fittings.\u003cbr\u003e\u003c\/span\u003e\u003ci\u003e* Accessory brackets are sold separately\u003c\/i\u003e\u003cspan\u003e.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\nEMI Thunder manifolds are hard coat anodized to a military spec throughout to prevent corrosion.\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eStandard with Black, Blue, and Red Fusioncoat finishes.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cb\u003e\u003ci\u003e*Not for use with engines equipped with high performance camshafts!\u003c\/i\u003e\u003c\/b\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e\u003c\/b\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003cp\u003e\u003cspan\u003e\u003cb\u003eA Warranty Unlike Any Other!\u003c\/b\u003e\u003cbr\u003eAll EMI Thunder exhaust systems (except systems with a polished finish) come\u003cbr\u003ewith a limited 5 year warranty against defects and failure to the original owner!\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Eddie Marine","offers":[{"title":"Bright Polished Finish","offer_id":46892941705404,"sku":"EMI-551P","price":4781.95,"currency_code":"USD","in_stock":true},{"title":"Bright Blue Fusioncoat Finish","offer_id":46892941738172,"sku":"EMI-551B","price":4798.95,"currency_code":"USD","in_stock":true},{"title":"Gloss Black Fusioncoat Finish","offer_id":46892941770940,"sku":"EMI-551BK","price":4798.95,"currency_code":"USD","in_stock":true},{"title":"Bright Red Fusioncoat Finish","offer_id":46892941803708,"sku":"EMI-551R","price":4798.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0772\/8676\/8828\/files\/EMI-551-2T.png?v=1780438852"},{"product_id":"emi-thunder-exhaust-system-merc-496-mag-ho-with-ss-hi-perf-risers","title":"EMI Thunder Exhaust System - Merc 496 Mag \/ Ho with SS Hi Perf Risers","description":"\u003cdiv\u003e\u003cstrong\u003eEMI Thunder Exhaust System - Merc 496 Mag \/ Ho with SS Hi Perf Risers\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eOur EMI Thunder Exhaust system has been modified to work on the new 496 MAG and 425 MAG HO Mercruiser 496 engines. We found that these engines need a good exhaust system like EMI Thunder. On most applications our manifolds increased horsepower and torque by a minimum of ten percent on both the 375HP MAG and on the 425HP MAG HO. We are proud to offer a complete kit with specific mounting locations for oil filter and power steering brackets and exhaust temperature sensor as well as new oil lines to make your installation as simple as possible. Our system does not require remote installation of any part, everything stays on the engine. However, some minor modifications to the existing relay bracket is required. The EMI Thunder exhaust system is a direct replacement for most stock Mercruiser 496 applications ( if you have existing exhaust outlets, please check our dimensions to determine the correct fit before ordering! We are not responsible for exhaust systems that do not match up to existing holes in your boat's transom). \u003c\/span\u003e\u003cb\u003eNOTE:\u003c\/b\u003e\u003cspan\u003e Engines using larger than stock, aftermarket camshafts may require a dry tailpipe system to prevent reversion. Provide us with your camshaft's lope separation angle and duration at .050\" before choosing an exhaust system! These longer risers \u003c\/span\u003e\u003cb\u003eWILL NOT\u003cspan\u003e \u003c\/span\u003e\u003c\/b\u003e\u003cspan\u003ework with Selector systems or stock \"S\" pipe connections.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e\u003c\/b\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003cp\u003e\u003cspan\u003e\u003cb\u003eA Warranty Unlike Any Other!\u003c\/b\u003e\u003cbr\u003eAll EMI Thunder exhaust systems (except systems with a polished finish) come\u003cbr\u003ewith a limited 5 year warranty against defects and failure to the original owner!\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Eddie Marine","offers":[{"title":"Bright Polished Finish","offer_id":46892984828092,"sku":"EMI-611P","price":4501.95,"currency_code":"USD","in_stock":true},{"title":"Bright Blue Fusioncoat Finish","offer_id":46892984860860,"sku":"EMI-611B","price":4526.95,"currency_code":"USD","in_stock":true},{"title":"Gloss Black Fusioncoat Finish","offer_id":46892984893628,"sku":"EMI-611BK","price":4373.95,"currency_code":"USD","in_stock":true},{"title":"Bright Red Fusioncoat Finish","offer_id":46892984926396,"sku":"EMI-611R","price":4526.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0772\/8676\/8828\/files\/EMI-611-2T.png?v=1780440353"},{"product_id":"emi-thunder-exhaust-system-496-chevy-with-ss-silent-choice-risers","title":"EMI Thunder Exhaust System - 496 Chevy with SS Silent Choice Risers","description":"\u003cdiv\u003e\u003cstrong\u003eEMI Thunder Exhaust System - 496 Chevy with SS Silent Choice Risers\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eEquipped with our short performance Stainless Steel High Flow Risers, these are our best performing systems. They are a direct replacement for many stock Mercruiser manifolds in Bravo and Alpha applications using exhaust selector systems or Merc \"S\" pipes ( if you have existing exhaust outlets, please check our dimensions to determine the correct fit before ordering! We are not responsible for exhaust systems that do not match up to existing holes in your boat's transom). With this system with short Silent Choice risers, we \u003c\/span\u003e\u003cb\u003eDO NOT\u003c\/b\u003e\u003cspan\u003e recommended them for use with engines with aftermarket camshafts. Brackets to keep all of the stock components in their existing locations (shift quadrant, ignition module and oil filter bracket) are available and sold separately.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e\u003c\/b\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003cp\u003e\u003cspan\u003e\u003cb\u003eA Warranty Unlike Any Other!\u003c\/b\u003e\u003cbr\u003eAll EMI Thunder exhaust systems (except systems with a polished finish) come\u003cbr\u003ewith a limited 5 year warranty against defects and failure to the original owner!\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Eddie Marine","offers":[{"title":"Bright Polished Finish","offer_id":46893006225596,"sku":"EMI-612P","price":4501.95,"currency_code":"USD","in_stock":true},{"title":"Bright Blue Fusioncoat Finish","offer_id":46893006258364,"sku":"EMI-612B","price":4526.95,"currency_code":"USD","in_stock":true},{"title":"Gloss Black Fusioncoat Finish","offer_id":46893006291132,"sku":"EMI-612BK","price":4373.95,"currency_code":"USD","in_stock":true},{"title":"Bright Red Fusioncoat Finish","offer_id":46893006323900,"sku":"EMI-612R","price":4526.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0772\/8676\/8828\/files\/EMI-612-2T.png?v=1780440631"},{"product_id":"emi-thunder-exhaust-system-496-chevy-3-taller-risers","title":"EMI Thunder Exhaust System - 496 Chevy +3\" Taller Risers","description":"\u003cdiv\u003e\u003cstrong\u003eEMI Thunder Exhaust System - 496 Chevy +3\" Taller Risers\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003eEquipped with our performance Stainless Steel High Flow Risers, these are our best performing systems. EMI Thunder exhaust systems are a direct replacement for many stock Mercruiser manifolds in Bravo and Alpha applications with exhaust outlets in the stock location ( if you have existing exhaust outlets, please check our dimensions to determine the correct fit before ordering! We are not responsible for exhaust systems that do not match up to existing holes in your boat's transom). The 16\" long riser is a must with High Performance camshafts to prevent reversion (water ingestion). NOTE: Engines using larger than stock, aftermarket camshafts may require a dry tailpipe system to prevent reversion. Provide us with your camshaft's lobe separation angle and duration at .050\" before choosing an exhaust system! These longer risers \u003c\/span\u003e\u003cb\u003eWILL NOT\u003c\/b\u003e\u003cspan\u003e work with Selector systems or stock \"S\" pipe connections. Brackets to keep all of the stock components in their existing locations (shift quadrant, ignition module and oil filter bracket) are available and sold separately.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003eFeatures:\u003c\/b\u003e\u003cbr\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003e\u003c\/b\u003eLarge individual runners for ultra-efficient exhaust flow and velocity\u003c\/li\u003e\n\u003cli\u003eDirect replacement for many stock Mercruiser manifolds in Bravo \u0026amp; Alpha apps\u003cbr\u003e\u003ci\u003e\u003cspan\u003e*See our systems dimensions in the Technical Specs below to confirm fitment.\u003c\/span\u003e\u003c\/i\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMinimum 10% increase in torque and horsepower\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e316 stainless steel investment cast, one-piece riser flange\/inner pipe\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eStandard 4” exhaust hose connections\u003c\/li\u003e\n\u003cli\u003eIntegral water-cooled exhaust divider\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e70lbs lighter than stock cast iron exhaust systems\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eFive year limited warranty\u003c\/li\u003e\n\u003cli\u003eConstructed from the highest strength 356 aluminum\u003c\/li\u003e\n\u003cli\u003eThree step coating process for ultimate corrosion resistance\u003c\/li\u003e\n\u003cli\u003eHeat treated to a T-6 condition\u003c\/li\u003e\n\u003cli\u003eMilitary specification Hard-Coat Anodize undercoat\u003c\/li\u003e\n\u003cli\u003eUltra-durable Fusioncoat Finish\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cb\u003eSystem Includes:\u003cbr\u003e\u003c\/b\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003e\u003c\/b\u003e\u003cspan\u003e1pr. EMI Exhaust Manifolds\u003cbr\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003e1pr. Aluminum Risers\u003cbr\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eBolts, exhaust and riser gaskets, and fittings.\u003cbr\u003e\u003c\/span\u003e\u003ci\u003e* Accessory brackets are sold separately\u003c\/i\u003e\u003cspan\u003e.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\nEMI Thunder manifolds are hard coat anodized to a military spec throughout to prevent corrosion.\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eStandard with Black, Blue, and Red Fusioncoat finishes.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cb\u003e\u003ci\u003e*Not for use with engines equipped with high performance camshafts!\u003c\/i\u003e\u003c\/b\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e\u003c\/b\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003cp\u003e\u003cspan\u003e\u003cb\u003eA Warranty Unlike Any Other!\u003c\/b\u003e\u003cbr\u003eAll EMI Thunder exhaust systems (except systems with a polished finish) come\u003cbr\u003ewith a limited 5 year warranty against defects and failure to the original owner!\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Eddie Marine","offers":[{"title":"Bright Polished Finish","offer_id":46893015335100,"sku":"EMI-652P","price":4199.95,"currency_code":"USD","in_stock":true},{"title":"Bright Blue Fusioncoat Finish","offer_id":46893015367868,"sku":"EMI-652B","price":4229.95,"currency_code":"USD","in_stock":true},{"title":"Gloss Black Fusioncoat Finish","offer_id":46893015400636,"sku":"EMI-652BK","price":4076.95,"currency_code":"USD","in_stock":true},{"title":"Bright Red Fusioncoat Finish","offer_id":46893015433404,"sku":"EMI-652R","price":4229.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0772\/8676\/8828\/files\/EMI-652-2T.png?v=1780440968"},{"product_id":"emi-thunder-exhaust-system-496-chevy-with-ss-hi-performance-dry-pipe","title":"EMI Thunder Exhaust System - 496 Chevy with SS Hi Performance Dry Pipe","description":"\u003cdiv\u003e\u003cstrong\u003eEMI Thunder Exhaust System - 496 Chevy with SS Hi Performance Dry Pipe\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eEquipped with our performance dry Stainless Steel High Flow Risers, these are our best performing systems. EMI Thunder exhaust systems are a direct replacement for many stock Mercruiser manifolds in Bravo and Alpha applications with exhaust outlets in the stock location ( if you have existing exhaust outlets, please check our dimensions to determine the correct fit before ordering! We are not responsible for exhaust systems that do not match up to existing holes in your boat's transom).The long dry risers on these systems area must with High Performance camshafts to prevent reversion (water ingestion). Standard length on these risers is 32\" but they are made to order and can be built to a custom length at no extra cost (un usually long applications may require an additional charge). For custom pipes provide us a mock PVC example showing length from your front cylinder head bolt to the end of the tailpipe (See Mock-up Example images) With dry risers, the engine discharge water and exhaust do not mix until the very end of the tailpipe, outside of the boat, reducing the chance of reversion. They will be quite a bit louder than a standard set of risers.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e\u003c\/b\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003cp\u003e\u003cspan\u003e\u003cb\u003eA Warranty Unlike Any Other!\u003c\/b\u003e\u003cbr\u003eAll EMI Thunder exhaust systems (except systems with a polished finish) come\u003cbr\u003ewith a limited 5 year warranty against defects and failure to the original owner!\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Eddie Marine","offers":[{"title":"Bright Polished Finish","offer_id":46893030539452,"sku":"EMI-613P","price":4594.95,"currency_code":"USD","in_stock":true},{"title":"Bright Blue Fusioncoat Finish","offer_id":46893030572220,"sku":"EMI-613B","price":4619.95,"currency_code":"USD","in_stock":true},{"title":"Gloss Black Fusioncoat Finish","offer_id":46893030604988,"sku":"EMI-613BK","price":4466.95,"currency_code":"USD","in_stock":true},{"title":"Bright Red Fusioncoat Finish","offer_id":46893030637756,"sku":"EMI-613R","price":4619.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0772\/8676\/8828\/files\/EMI-613-2T.png?v=1780441492"},{"product_id":"emi-thunder-exhaust-system-496-chevy-with-ss-hi-perf-s-pipe-kit","title":"EMI Thunder Exhaust System - 496 Chevy with SS Hi Perf S - Pipe Kit","description":"\u003cdiv\u003e\u003cstrong\u003eEMI Thunder Exhaust System - 496 Chevy with SS Hi Perf S - Pipe Kit\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eEquipped with our performance Stainless Steel High Flow Risers, these are our best performing option for running your exhaust low, under your swim steps. EMI Thunder exhaust systems are a direct replacement for many stock Mercruiser manifolds in Bravo and Alpha applications with exhaust outlets in the stock location ( if you have existing exhaust outlets, please check our dimensions to determine the correct fit before ordering! We are not responsible for exhaust systems that do not match up to existing holes in your boat's transom). The long \"S\" risers on these systemsnot only get the exhaust low but they are ideal for engines equipped withHigh Performance camshafts to prevent reversion (water ingestion). NOTE: Engines using larger than stock, aftermarket camshafts may require a dry tailpipe system to prevent reversion. Provide us with your camshaft's lope separation angle and duration at .050\"before choosing an exhaust system!These longer risers WILL NOT work with Selector systems or stock \"S\" pipe connections. Brackets to keep all of the stock componenets in their existing locations (shift quadrant, ignition module and oil filter bracket) are available and sold separately.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e\u003c\/b\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003cp\u003e\u003cspan\u003e\u003cb\u003eA Warranty Unlike Any Other!\u003c\/b\u003e\u003cbr\u003eAll EMI Thunder exhaust systems (except systems with a polished finish) come\u003cbr\u003ewith a limited 5 year warranty against defects and failure to the original owner!\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Eddie Marine","offers":[{"title":"Bright Polished Finish","offer_id":46893037879484,"sku":"EMI-651P","price":4781.95,"currency_code":"USD","in_stock":true},{"title":"Bright Blue Fusioncoat Finish","offer_id":46893037912252,"sku":"EMI-651B","price":4798.95,"currency_code":"USD","in_stock":true},{"title":"Gloss Black Fusioncoat Finish","offer_id":46893037945020,"sku":"EMI-651BK","price":4654.95,"currency_code":"USD","in_stock":true},{"title":"Bright Red Fusioncoat Finish","offer_id":46893037977788,"sku":"EMI-651R","price":4798.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0772\/8676\/8828\/files\/EMI-651-2T.png?v=1780441784"}],"url":"https:\/\/eddiemarine.com\/collections\/emi-thunder-exhaust-big-block-chevy.oembed","provider":"Eddie Marine","version":"1.0","type":"link"}