{"product_id":"porter-muffler-10-stainless-steel-packed-race-exhaust-resonator","title":"Porter Muffler 10\" Stainless Steel Packed Race Exhaust Resonator","description":"\u003cp\u003eThe \u003cb\u003ePorter Muffler 10\" Race Exhaust Resonator\u003c\/b\u003e is an ultra-compact, high-flow exhaust sound-attenuation unit built specifically for high-horsepower engines, 2-into-1 merge collectors, track-dedicated race vehicles, and off-road builds. Engineered to satisfy track sound-limit regulations without sacrificing engine power or exhaust gas velocity, it offers maximum exhaust flow in a minimal footprint.\u003c\/p\u003e\n\u003cblockquote\u003e\n\u003cp\u003e\u003cb\u003eNote:\u003c\/b\u003e This component is designed and intended \u003cb\u003estrictly for off-road and closed-course racing applications only\u003c\/b\u003e.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003ch3\u003eProduct Overview \u0026amp; Race Engineering\u003c\/h3\u003e\n\u003cp\u003eHigh-horsepower engines and open header race setups produce extreme sound pressure levels and harsh high-frequency harmonics. Traditional race mufflers can create restrictive backpressure that robs top-end horsepower, while standard glasspacks quickly burn out under severe track exhaust heat.\u003c\/p\u003e\n\u003cp\u003eThe Porter 10\" Race Resonator solves this by utilizing an ultra-short \u003cb\u003e7.00\" casing length\u003c\/b\u003e (10.00\" overall length) packed with Porter's signature \u003cb\u003eblow-proof stainless steel wool\u003c\/b\u003e. Designed to handle high-velocity exhaust pulses from big-block, forced-induction, or large-displacement V8 engines, it tames peak decibels to clear track sound checks while maintaining an uninhibited, straight-through flow path.\u003c\/p\u003e\n\u003ch3\u003eKey Features \u0026amp; Design Highlights\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eUltra-Compact 7\" Body Length:\u003c\/b\u003e 10\" overall length fits into tight chassis pockets, transmission tunnels, or directly behind merge collectors on race headers.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eZero Horsepower Loss:\u003c\/b\u003e Straight-through internal core architecture ensures maximum exhaust gas velocity and zero restrictive backpressure.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eTrack Sound Rule Compliance:\u003c\/b\u003e Reduces harsh peak decibels and high-frequency rasp to satisfy sanctioning-body sound-level limits.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eBlow-Proof Stainless Steel Packing:\u003c\/b\u003e Internal stainless steel wool packing will not burn out, degrade, or blow apart under extreme race exhaust temperatures.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003e2-into-1 Collector Compatibility:\u003c\/b\u003e Sized to fit single-pipe or large-diameter 2-into-1 merge collector exhaust configurations on high-output builds.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eHeavy-Duty Construction:\u003c\/b\u003e Built with thick-wall steel to withstand track impacts, exhaust backfires, and high-RPM vibration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eHandmade in the USA:\u003c\/b\u003e Built with U.S.-sourced steel products.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specification Matrix\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFeature \/ Metric\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eTechnical Specification Detail\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eManufacturer\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003ePorter Mufflers\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eProduct Line\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eRace Series Exhaust Resonator\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eOverall Length\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e10.00 Inches\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eBody \/ Case Length\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e7.00 Inches\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003ePrimary Application\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eHigh-Horsepower Engines, Track \/ Drag Racing, 2-into-1 Merge Systems\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eLegal Status\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eOff-Road and Closed-Course Racing Use Only\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eInternal Packing\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eHigh-Density Blow-Proof Stainless Steel Wool\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eFlow Architecture\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eHigh-Flow Straight-Through Core\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eCountry of Manufacture\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eHandmade in the USA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eInstallation \u0026amp; System Placement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003ePlacement:\u003c\/b\u003e Position directly downstream of header collectors or merge Y-pipes to attenuate acoustic spikes at the source.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eWelded Joint Assembly:\u003c\/b\u003e Due to the severe vibration and high thermal cycling in racing environments, fully seam-welding the slip-fit joints to the primary exhaust tubing is strongly recommended.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Porter Mufflers","offers":[{"title":"4\"","offer_id":52887494328452,"sku":"POR PM504007","price":139.95,"currency_code":"USD","in_stock":true},{"title":"5\"","offer_id":52887494361220,"sku":"POR PM605007","price":144.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0286\/1180\/5316\/files\/raceres.webp?v=1790166966","url":"https:\/\/hotrodhardware.com\/products\/porter-muffler-10-stainless-steel-packed-race-exhaust-resonator","provider":"Hot Rod Hardware","version":"1.0","type":"link"}