{"product":{"id":11350221128022,"title":"Kooks Header-Back Exhaust for Ford Mustang GTD (2025+)","body_html":"\u003ch2\u003eAn exhaust upgrade built around your GTD\u003c\/h2\u003e\u003cp\u003eFor a dedicated GTD competition build, this Kooks header-back arrangement gives the supercharged 5.2 a matched 3\" exhaust behind the headers. It includes front connections, a long-merge ULTRA X-pipe and clamps, finishing at the compatible OEM axle-back. Choose GREEN catted or catalyst-free pipework for the specification you are building.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSKUs:\u003c\/strong\u003e 11575180, 11575380\u003c\/p\u003e\u003ch2\u003eRetain the compatible OEM axle-back\u003c\/h2\u003e\u003cp\u003eThe package completes matching Kooks long tube headers and connects to the OEM axle-back. You can change the front connections and crossover while retaining the rear section, with the ULTRA X-pipe providing the long-merge crossover layout.\u003c\/p\u003e\u003ch2\u003eTwo catalyst specifications, one competition application\u003c\/h2\u003e\u003cp\u003eThe Competition Only version supplies catalyst-free connections. The GREEN version supplies catted connections. Both versions on this listing are competition, off-road and track-use products, are not for public-road use and require the Kooks competition-use waiver. The presence of a catalyst does not change that stated use.\u003c\/p\u003e\u003ch2\u003ePlan the full GTD setup\u003c\/h2\u003e\u003cp\u003eMatching Kooks headers are required and purchased separately. We recommend professional fitting and calibration for the complete system, including alignment, heat clearance, O2 wiring and a first heat-cycle fastener check.\u003c\/p\u003e\u003ch2\u003eChoose your option\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eSKU\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eCat Type\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eFitting \/ contents\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eStated use restriction\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e11575180\u003c\/td\u003e\n\u003ctd\u003eComp. Only\u003c\/td\u003e\n\u003ctd\u003e3\" header-back with ULTRA X-pipe and clamps; OEM axle-back connection; headers purchased separately.\u003c\/td\u003e\n\u003ctd\u003eCompetition, off-road and track use only. Not for use on public roads. Kooks competition-use waiver required.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e11575380\u003c\/td\u003e\n\u003ctd\u003eGREEN Cats\u003c\/td\u003e\n\u003ctd\u003e3\" header-back with ULTRA X-pipe and clamps; OEM axle-back connection; headers purchased separately.\u003c\/td\u003e\n\u003ctd\u003eCompetition, off-road and track use only. Not for use on public roads. Kooks competition-use waiver required.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eVehicle fitment\u003c\/h2\u003e\u003ctable class=\"vehicle-fitment\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eYears\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eVehicle and trim\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eEngine\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eApplicable SKU \/ fitting conditions\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e2025-2026\u003c\/td\u003e\n\u003ctd\u003eFord Mustang GTD\u003c\/td\u003e\n\u003ctd\u003e5.2L V8\u003c\/td\u003e\n\u003ctd\u003e11575180, 11575380\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\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\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eFord Mustang GTD, 2025+; supercharged 5.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem type\u003c\/td\u003e\n\u003ctd\u003eHeader-back with ULTRA long-merge X-pipe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePipe diameter\u003c\/td\u003e\n\u003ctd\u003e3\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupplied parts\u003c\/td\u003e\n\u003ctd\u003eFront connections, ULTRA X-pipe and clamps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear connection\u003c\/td\u003e\n\u003ctd\u003eCompatible OEM axle-back\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRequired headers\u003c\/td\u003e\n\u003ctd\u003eMatching Kooks headers, purchased separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUse\u003c\/td\u003e\n\u003ctd\u003eBoth versions: competition, off-road and track only; no public-road use; competition-use waiver required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eFAQs\u003c\/h2\u003e\u003ch3\u003eDoes this include the headers?\u003c\/h3\u003e\u003cp\u003eNo. It completes matching Kooks long tube headers, purchased separately.\u003c\/p\u003e\u003ch3\u003eCan I keep the OEM axle-back?\u003c\/h3\u003e\u003cp\u003eYes, using the compatible OEM rear connection.\u003c\/p\u003e\u003ch3\u003eDoes the GREEN option make this a road-use product?\u003c\/h3\u003e\u003cp\u003eNo. Both listed GTD versions are competition, off-road and track-use products only and require the competition-use waiver.\u003c\/p\u003e\u003ch3\u003eWill it fit a Mustang GT or Dark Horse?\u003c\/h3\u003e\u003cp\u003eThis package is specifically for the GTD 5.2 application. Choose an exhaust matched to the GT or Dark Horse for those cars.\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 Systems","created_at":"2026-10-08T10:41:59+01:00","handle":"kooks-ford-mustang-gtd-5-2l-header-back-exhausts","updated_at":"2026-10-12T06:06:11+01:00","published_at":"2026-10-09T13:07:26+01:00","template_suffix":null,"published_scope":"global","tags":"brand:kooks, cat:exhausts, dept:performance-parts, fits:ford-mustang, make:ford, type:exhaust-system","variants":[{"id":55646917263702,"product_id":11350221128022,"title":"Comp. Only","price":"2602.06","sku":"11575180","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"Comp. 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