{"product":{"id":11350207136086,"title":"Kooks Mustang GT 4.6 Header and X \/ H-Pipe Kits (2005-2010)","body_html":"\u003ch2\u003eChoose the exhaust character you want for your Mustang\u003c\/h2\u003e\u003cp\u003eGive your 4.6-litre Mustang a matched Kooks long tube header kit with the crossover and catalysts that suit your build. Choose an X-pipe or H-pipe with Performance or GREEN cats, all paired with 1-5\/8\" headers and the 2-1\/2\" OEM rear connection.\u003c\/p\u003e\u003cp\u003eSKUs: 1131H020, 1131H030, 1131H050, 1131H060\u003c\/p\u003e\u003ch2\u003eChoose an X-pipe or H-pipe\u003c\/h2\u003e\u003cp\u003eAn X-pipe merges the exhaust streams; an H-pipe uses a balance tube between the banks. An X generally favours a smoother, higher-pitched character and an H a deeper tone. Your rear mufflers and the rest of the system also shape the sound.\u003c\/p\u003e\u003ch2\u003eMade for manual and automatic cars\u003c\/h2\u003e\u003cp\u003eBoth transmission layouts are supported. The headers and crossover use 16-gauge 304 stainless steel, with mandrel-bent primaries, 3\/8\" laser-cut flanges and the stock bolt pattern. Necessary installation hardware is included.\u003c\/p\u003e\u003ch2\u003eMatch the catalysts to your modifications\u003c\/h2\u003e\u003cp\u003ePerformance cats suit naturally aspirated engines. GREEN is suitable for forced induction. Both catalyst choices use a 400-cell specification on these exact kits, but the engine-use distinction still matters when choosing the package.\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\u003e1131H020\u003c\/td\u003e\n\u003ctd\u003eCat Type: Performance Cats; Crossover Type: X Pipe\u003c\/td\u003e\n\u003ctd\u003eHeaders; Performance Cats X-pipe; Necessary installation hardware included\u003c\/td\u003e\n\u003ctd\u003eNaturally aspirated only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1131H030\u003c\/td\u003e\n\u003ctd\u003eCat Type: GREEN Cats; Crossover Type: X Pipe\u003c\/td\u003e\n\u003ctd\u003eHeaders; GREEN Cats X-pipe; Necessary installation hardware included\u003c\/td\u003e\n\u003ctd\u003eUse the SKU-specific vehicle rows below\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1131H050\u003c\/td\u003e\n\u003ctd\u003eCat Type: Performance Cats; Crossover Type: H Pipe\u003c\/td\u003e\n\u003ctd\u003eHeaders; Performance Cats H-pipe; Necessary installation hardware included\u003c\/td\u003e\n\u003ctd\u003eNaturally aspirated only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1131H060\u003c\/td\u003e\n\u003ctd\u003eCat Type: GREEN Cats; Crossover Type: H Pipe\u003c\/td\u003e\n\u003ctd\u003eHeaders; GREEN Cats H-pipe; Necessary installation hardware included\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 every header installation so the calibration suits your new headers, complete exhaust and fuel. \u003ca href=\"https:\/\/hooniesadrenaline.co.uk\/pages\/contact\"\u003eContact us\u003c\/a\u003e to discuss the right tuning route for your vehicle.\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\u003e2005-2010\u003c\/td\u003e\n\u003ctd\u003eFord Mustang GT\u003c\/td\u003e\n\u003ctd\u003e4.6L V8\u003c\/td\u003e\n\u003ctd\u003e1131H020, 1131H030, 1131H050, 1131H060\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2007-2008\u003c\/td\u003e\n\u003ctd\u003eFord Mustang Shelby GT\u003c\/td\u003e\n\u003ctd\u003e4.6L V8\u003c\/td\u003e\n\u003ctd\u003e1131H020, 1131H030, 1131H050, 1131H060\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2008-2009\u003c\/td\u003e\n\u003ctd\u003eFord Mustang Bullitt\u003c\/td\u003e\n\u003ctd\u003e4.6L V8\u003c\/td\u003e\n\u003ctd\u003e1131H020, 1131H030, 1131H050, 1131H060\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\u003e1131H020, 1131H030, 1131H050, 1131H060\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eListed 2005-2010 Mustang 4.6L 3V applications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmissions\u003c\/td\u003e\n\u003ctd\u003eManual or automatic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e16-gauge 304 stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeaders\u003c\/td\u003e\n\u003ctd\u003e1-5\/8\" primaries; 2-1\/2\" collectors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlanges\u003c\/td\u003e\n\u003ctd\u003e3\/8\" laser-cut; stock bolt pattern\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCrossover \/ rear outlet\u003c\/td\u003e\n\u003ctd\u003e2-1\/2\" X or H-pipe; 2-1\/2\" OEM outlets\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCatalysts\u003c\/td\u003e\n\u003ctd\u003ePerformance or GREEN; 400-cell specification\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003ctd\u003eHeaders, selected crossover and necessary installation hardware\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\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eCan I choose either crossover with GREEN cats?\u003c\/h3\u003e\u003cp\u003eYes. Both GREEN X-pipe and GREEN H-pipe kits are available.\u003c\/p\u003e\u003ch3\u003eWill this fit an automatic Mustang?\u003c\/h3\u003e\u003cp\u003eYes, for the listed engine, trim and year applications.\u003c\/p\u003e\u003ch3\u003eAre the rear mufflers part of the kit?\u003c\/h3\u003e\u003cp\u003eThe package joins the OEM rear interface, retaining a compatible rear exhaust.\u003c\/p\u003e\u003ch2\u003eIntended use\u003c\/h2\u003e\u003cp\u003e1131H020, 1131H050: 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":"2026-10-08T10:41:05+01:00","handle":"kooks-2005-2010-ford-mustang-gt-4-6l-header-conn-kits","updated_at":"2026-10-10T18:30:21+01:00","published_at":"2026-10-09T13:43:10+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":55646894260566,"product_id":11350207136086,"title":"Performance Cats \/ X Pipe","price":"2559.28","sku":"1131H020","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"Performance Cats","option2":"X Pipe","option3":null,"created_at":"2026-10-08T10:41:05+01:00","updated_at":"2026-10-10T18:30:21+01:00","taxable":true,"barcode":"842422134587","grams":24040,"image_id":null,"weight":24.04,"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":55646894293334,"product_id":11350207136086,"title":"GREEN Cats \/ X Pipe","price":"3127.26","sku":"1131H030","position":2,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"GREEN Cats","option2":"X Pipe","option3":null,"created_at":"2026-10-08T10:41:05+01:00","updated_at":"2026-10-10T18:30:21+01:00","taxable":true,"barcode":"842422177584","grams":24948,"image_id":null,"weight":24.948,"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":55646894326102,"product_id":11350207136086,"title":"Performance Cats \/ H Pipe","price":"2668.64","sku":"1131H050","position":3,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"Performance Cats","option2":"H Pipe","option3":null,"created_at":"2026-10-08T10:41:05+01:00","updated_at":"2026-10-10T18:30:21+01:00","taxable":true,"barcode":"842422179304","grams":25401,"image_id":null,"weight":25.401,"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":55646894358870,"product_id":11350207136086,"title":"GREEN Cats \/ H Pipe","price":"3236.63","sku":"1131H060","position":4,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"GREEN Cats","option2":"H Pipe","option3":null,"created_at":"2026-10-08T10:41:05+01:00","updated_at":"2026-10-10T18:30:21+01:00","taxable":true,"barcode":"842422179311","grams":26762,"image_id":null,"weight":26.762,"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":14512388702550,"product_id":11350207136086,"name":"Cat Type","position":1,"values":["Performance Cats","GREEN Cats"]},{"id":14512388768086,"product_id":11350207136086,"name":"Crossover Type","position":2,"values":["X Pipe","H Pipe"]}],"images":[{"id":86449200890198,"product_id":11350207136086,"position":1,"created_at":"2026-10-08T10:41:05+01:00","updated_at":"2026-10-08T10:41:08+01:00","alt":"Kooks 2005-2010 Ford Mustang GT 4.6L Header\/Conn. 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