{"product":{"id":11350237184342,"title":"Kooks Corvette C6 LS3 X-Pipes, TORCA Revision (2009-2013)","body_html":"\u003ch2\u003eFinish your C6 header upgrade with the matching revised X-pipe\u003c\/h2\u003e\u003cp\u003eConnect revised Kooks TORCA-clamp headers to the 2-1\/2\" OEM rear exhaust on your 2009-2013 LS3 Corvette. These three-piece X-pipes offer Competition Only, Performance or GREEN cats, with the mid-pipes and installation clamps included.\u003c\/p\u003e\u003cp\u003eSKUs: 21603111, 21603211, 21603311\u003c\/p\u003e\u003ch2\u003eMatch the header joint, not just the year\u003c\/h2\u003e\u003cp\u003eThese are the TORCA Swivel-Seal revision. They require the revised Kooks headers and do not join the older two-bolt-flange headers. That joint style is the first thing to check when adding an X-pipe to an existing Kooks installation.\u003c\/p\u003e\u003ch2\u003eA crossover with the rear transitions supplied\u003c\/h2\u003e\u003cp\u003eThe 3\" X-pipe includes 3\" to 2-1\/2\" mid-pipes for the OEM-style rear exhaust and all necessary installation clamps. GREEN supports forced induction; Performance is for naturally aspirated use. Competition Only supplies the uncatted competition arrangement.\u003c\/p\u003e\u003cp\u003eThe GREEN catalysts in 21603311 are rated for up to 750 wheel horsepower.\u003c\/p\u003e\u003ch2\u003eChoose your configuration\u003c\/h2\u003e\u003cdiv class=\"table-scroll\"\u003e\u003ctable class=\"variant-comparison\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eSKU\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eConfiguration\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eSupplied arrangement\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eFitting \/ engine conditions\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e21603111\u003c\/td\u003e\n\u003ctd\u003eModel Year: 2009-2013; Cat Type: Comp. Only\u003c\/td\u003e\n\u003ctd\u003eCompetition Only connection assembly; 3\" to 2-1\/2\" mid-pipes and necessary clamps included\u003c\/td\u003e\n\u003ctd\u003eRevised Kooks TORCA Swivel-Seal headers only; Uncatted; competition use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e21603211\u003c\/td\u003e\n\u003ctd\u003eModel Year: 2009-2013; Cat Type: Performance Cats\u003c\/td\u003e\n\u003ctd\u003ePerformance Cats connection assembly; 3\" to 2-1\/2\" mid-pipes and necessary clamps included\u003c\/td\u003e\n\u003ctd\u003eRevised Kooks TORCA Swivel-Seal headers only; Naturally aspirated only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e21603311\u003c\/td\u003e\n\u003ctd\u003eModel Year: 2009-2013; Cat Type: GREEN Cats\u003c\/td\u003e\n\u003ctd\u003eGREEN Cats connection assembly; 3\" to 2-1\/2\" mid-pipes and necessary clamps included; GREEN catalysts rated up to 750 wheel horsepower\u003c\/td\u003e\n\u003ctd\u003eRevised Kooks TORCA Swivel-Seal headers only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch2\u003eMatching products\u003c\/h2\u003e\u003cp\u003eThe \u003ca href=\"https:\/\/hooniesadrenaline.co.uk\/products\/kooks-2005-2013-c6-corvette-base-grand-sport-headers?variant=55646888395094\"\u003erevised C6 TORCA headers\u003c\/a\u003e provide the matching Swivel-Seal joint. Choose the X-pipe year range for your own LS2 or LS3 Corvette.\u003c\/p\u003e\u003ch2\u003eVehicle fitment\u003c\/h2\u003e\u003cdiv class=\"table-scroll\"\u003e\u003ctable class=\"vehicle-fitment\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eYears\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eVehicle \/ trim\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eEngine\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eApplicable SKU\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eFitting conditions\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2009-2013\u003c\/td\u003e\n\u003ctd\u003eChevrolet Corvette Base\u003c\/td\u003e\n\u003ctd\u003e6.2L V8\u003c\/td\u003e\n\u003ctd\u003e21603111, 21603211, 21603311\u003c\/td\u003e\n\u003ctd\u003eRevised Kooks TORCA Swivel-Seal headers only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2010-2013\u003c\/td\u003e\n\u003ctd\u003eChevrolet Corvette Grand Sport\u003c\/td\u003e\n\u003ctd\u003e6.2L V8\u003c\/td\u003e\n\u003ctd\u003e21603111, 21603211, 21603311\u003c\/td\u003e\n\u003ctd\u003eRevised Kooks TORCA Swivel-Seal headers only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cdiv class=\"table-scroll\"\u003e\u003ctable class=\"technical-specifications\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eSpecification\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKUs\u003c\/td\u003e\n\u003ctd\u003e21603111, 21603211, 21603311\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplications\u003c\/td\u003e\n\u003ctd\u003e2009-2013 C6 LS3 6.2L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e304 stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeader interface\u003c\/td\u003e\n\u003ctd\u003eTORCA Swivel-Seal; revised Kooks headers only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eX-section\u003c\/td\u003e\n\u003ctd\u003eThree piece; 3\" pipework\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded rear transitions\u003c\/td\u003e\n\u003ctd\u003e3\" to 2-1\/2\" mid-pipes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear outlet\u003c\/td\u003e\n\u003ctd\u003e2-1\/2\" OEM-style exhaust\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClamps\u003c\/td\u003e\n\u003ctd\u003eAll necessary installation clamps included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChoices\u003c\/td\u003e\n\u003ctd\u003eCompetition Only; Performance; GREEN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePerformance condition\u003c\/td\u003e\n\u003ctd\u003eNaturally aspirated only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExcluded front interfaces\u003c\/td\u003e\n\u003ctd\u003eOEM manifolds\/cats and old two-bolt Kooks header flanges\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e21603311 catalyst rating\u003c\/td\u003e\n\u003ctd\u003eUp to 750 wheel horsepower\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eWill it fit my older two-bolt Kooks headers?\u003c\/h3\u003e\u003cp\u003eChoose an X-pipe matched to that older joint. This listing is the revised TORCA Swivel-Seal arrangement.\u003c\/p\u003e\u003ch3\u003eAre the rear mid-pipes and clamps included?\u003c\/h3\u003e\u003cp\u003eYes. The 3\" to 2-1\/2\" mid-pipes and necessary clamps are included.\u003c\/p\u003e\u003ch3\u003eCan it fit under factory manifolds?\u003c\/h3\u003e\u003cp\u003eThese X-pipes require the revised Kooks headers.\u003c\/p\u003e\u003ch2\u003eIntended use\u003c\/h2\u003e\u003cp\u003e21603111, 21603211: Competition, off-road and track use only. Not for use on public roads.\u003c\/p\u003e\u003cp\u003eThe competition-use waiver applies to 21603111.\u003c\/p\u003e\u003ch2\u003eOrdering and delivery\u003c\/h2\u003e\u003cp\u003eEstimated lead time is 4-6 weeks. Delivery may be faster depending on stock levels. Shipping is charged separately.\u003c\/p\u003e","vendor":"Kooks","product_type":"Exhaust Pipes","created_at":"2026-10-08T10:49:34+01:00","handle":"kooks-2005-2013-c6-corvette-base-grand-sport-x-pipes-759eac69","updated_at":"2026-10-10T18:30:54+01:00","published_at":"2026-10-09T13:33:01+01:00","template_suffix":null,"published_scope":"global","tags":"brand:kooks, cat:exhausts, dept:performance-parts, fits:chevrolet-corvette, make:chevrolet, type:exhaust-pipe","variants":[{"id":55646989844822,"product_id":11350237184342,"title":"2009-2013 \/ Comp. Only","price":"1644.78","sku":"21603111","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"2009-2013","option2":"Comp. 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