{"product":{"id":11350218735958,"title":"Kooks Mustang 5.0 Header and OEM Connection Kits (2015-2026)","body_html":"\u003ch2\u003eGive your Mustang a front exhaust upgrade to match your plans\u003c\/h2\u003e\u003cp\u003eChoose a Kooks long tube header kit with Performance or GREEN catted connections for the supported 5.0-litre Mustang applications. Both packages include OEM adapters and fitting parts, letting you keep a compatible rear exhaust while upgrading the front system.\u003c\/p\u003e\u003cp\u003eSKUs: 1151H422, 1151H432\u003c\/p\u003e\u003ch2\u003eChoose the catalyst for your Coyote\u003c\/h2\u003e\u003cp\u003ePerformance cats are for naturally aspirated engines. GREEN supports forced induction and is paired here with 1-7\/8\" primaries. Both kits use 3\" collectors, 3\/8\" laser-cut flanges and a dual bolt-pattern header flange.\u003c\/p\u003e\u003cp\u003eThe GREEN catalysts in 1151H432 are rated for up to 750 RWHP.\u003c\/p\u003e\u003ch2\u003eFitting parts are part of the package\u003c\/h2\u003e\u003cp\u003eGaskets, the oxygen-sensor extension harness, clamps and bolt kit are included, along with OEM adapters. That brings the principal header conversion components together in one purchase. GT, Bullitt, Mach 1 and Dark Horse years remain separate in the fitment table.\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\u003e1151H422\u003c\/td\u003e\n\u003ctd\u003eCat Type: Performance Cats\u003c\/td\u003e\n\u003ctd\u003eHeaders; Performance Cats front connections; OEM adapters, gaskets, O2 extension harness, clamps and bolt kit included\u003c\/td\u003e\n\u003ctd\u003eNaturally aspirated only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1151H432\u003c\/td\u003e\n\u003ctd\u003eHeader Size: 1-7\/8\"; Cat Type: GREEN Cats\u003c\/td\u003e\n\u003ctd\u003e1-7\/8\" headers; GREEN Cats front connections; OEM adapters, gaskets, O2 extension harness, clamps and bolt kit included; GREEN catalysts rated up to 750 RWHP\u003c\/td\u003e\n\u003ctd\u003eUse the SKU-specific vehicle rows below\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch2\u003eTuning for your exhaust upgrade\u003c\/h2\u003e\u003cp\u003eWe recommend tuning with the header installation. The \u003ca href=\"https:\/\/hooniesadrenaline.co.uk\/products\/ford-mustang-gt-5-0l-v8-2015-2017-custom-ecu-tuning\"\u003e2015-2017 Mustang GT custom tuning\u003c\/a\u003e listing covers those GT years. For later GT cars, Bullitt, Mach 1 or Dark Horse, \u003ca href=\"https:\/\/hooniesadrenaline.co.uk\/pages\/contact\"\u003econtact us\u003c\/a\u003e about calibration for the complete header setup.\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\u003e2015-2026\u003c\/td\u003e\n\u003ctd\u003eFord Mustang GT\u003c\/td\u003e\n\u003ctd\u003e5.0L V8\u003c\/td\u003e\n\u003ctd\u003e1151H422, 1151H432\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2015-2026\u003c\/td\u003e\n\u003ctd\u003eFord Mustang GT Premium\u003c\/td\u003e\n\u003ctd\u003e5.0L V8\u003c\/td\u003e\n\u003ctd\u003e1151H422, 1151H432\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2019-2020\u003c\/td\u003e\n\u003ctd\u003eFord Mustang Bullitt\u003c\/td\u003e\n\u003ctd\u003e5.0L V8\u003c\/td\u003e\n\u003ctd\u003e1151H422, 1151H432\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2021-2023\u003c\/td\u003e\n\u003ctd\u003eFord Mustang Mach 1\u003c\/td\u003e\n\u003ctd\u003e5.0L V8\u003c\/td\u003e\n\u003ctd\u003e1151H422, 1151H432\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2024-2026\u003c\/td\u003e\n\u003ctd\u003eFord Mustang Dark Horse\u003c\/td\u003e\n\u003ctd\u003e5.0L V8\u003c\/td\u003e\n\u003ctd\u003e1151H422, 1151H432\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2024-2026\u003c\/td\u003e\n\u003ctd\u003eFord Mustang Dark Horse Premium\u003c\/td\u003e\n\u003ctd\u003e5.0L V8\u003c\/td\u003e\n\u003ctd\u003e1151H422, 1151H432\u003c\/td\u003e\n\u003ctd\u003e\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\u003e1151H422, 1151H432\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplications\u003c\/td\u003e\n\u003ctd\u003eListed Mustang 5.0 GT \/ GT Premium \/ Bullitt \/ Mach 1 \/ Dark Horse trims and years\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\u003eCollectors\u003c\/td\u003e\n\u003ctd\u003e3\" with Kooks scavenging spike\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlanges\u003c\/td\u003e\n\u003ctd\u003e3\/8\" laser-cut; dual bolt-pattern header flange\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGREEN primary tubing\u003c\/td\u003e\n\u003ctd\u003e1-7\/8\" on 1151H432\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCatalysts\u003c\/td\u003e\n\u003ctd\u003ePerformance or GREEN; both exact pages specify 400-cell cats\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003ctd\u003eHeaders, selected connections, OEM adapters, gaskets, O2 extension harness, clamps and bolt kit\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\u003e1151H432 catalyst rating\u003c\/td\u003e\n\u003ctd\u003eUp to 750 RWHP\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\u003eWhich kit should I choose for a supercharger?\u003c\/h3\u003e\u003cp\u003eChoose the GREEN-catted 1151H432 from these two packages.\u003c\/p\u003e\u003ch3\u003eDo I need to buy OEM adapters separately?\u003c\/h3\u003e\u003cp\u003eNo. OEM adapters are included with both kits.\u003c\/p\u003e\u003ch2\u003eIntended use\u003c\/h2\u003e\u003cp\u003e1151H422: Competition, off-road and track use only. Not for use on public roads.\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":"Header Kits","created_at":"2026-10-08T10:41:47+01:00","handle":"kooks-2015-2026-ford-mustang-gt-5-0l-header-conn-kits-95d36c35","updated_at":"2026-10-11T14:09:56+01:00","published_at":"2026-10-09T13:36:27+01:00","template_suffix":null,"published_scope":"global","tags":"brand:kooks, cat:exhausts, dept:performance-parts, fits:ford-mustang, make:ford, type:header-kit","variants":[{"id":55646911562070,"product_id":11350218735958,"title":"1-7\/8\" \/ Performance Cats","price":"2813.77","sku":"1151H422","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"1-7\/8\"","option2":"Performance Cats","option3":null,"created_at":"2026-10-08T10:41:47+01:00","updated_at":"2026-10-11T14:09:56+01:00","taxable":true,"barcode":"842422180836","grams":23133,"image_id":null,"weight":23.133,"weight_unit":"kg","requires_shipping":true,"quantity_rule":{"min":1,"max":null,"increment":1},"price_currency":"GBP","compare_at_price_currency":"","quantity_price_breaks":[]},{"id":55646911594838,"product_id":11350218735958,"title":"1-7\/8\" \/ GREEN Cats","price":"3381.76","sku":"1151H432","position":2,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"1-7\/8\"","option2":"GREEN Cats","option3":null,"created_at":"2026-10-08T10:41:47+01:00","updated_at":"2026-10-11T14:09:56+01:00","taxable":true,"barcode":"842422180843","grams":23133,"image_id":null,"weight":23.133,"weight_unit":"kg","requires_shipping":true,"quantity_rule":{"min":1,"max":null,"increment":1},"price_currency":"GBP","compare_at_price_currency":"","quantity_price_breaks":[]}],"options":[{"id":14512402825558,"product_id":11350218735958,"name":"Header Size","position":1,"values":["1-7\/8\""]},{"id":14512402858326,"product_id":11350218735958,"name":"Cat Type","position":2,"values":["Performance Cats","GREEN Cats"]}],"images":[{"id":86449306698070,"product_id":11350218735958,"position":1,"created_at":"2026-10-08T10:41:47+01:00","updated_at":"2026-10-08T10:41:50+01:00","alt":"Kooks 2015-2026 Ford Mustang GT 5.0L Header\/Connection Kits - 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