{"product":{"id":11350210675030,"title":"Kooks Ford Mustang GT 5.0 Header and Crossover Kits (2011-2014)","body_html":"\u003ch2\u003eMake your Coyote Mustang sound and feel more like your car\u003c\/h2\u003e\u003cp\u003eUpgrade the front exhaust on your 2011-2014 Mustang GT with Kooks 1-7\/8\" long tube headers and a matching crossover. Choose Performance cats with an X-pipe, or GREEN cats with an X-pipe or H-pipe, while keeping the 2-3\/4\" OEM rear exhaust interface.\u003c\/p\u003e\u003cp\u003eSKUs: 1141H420, 1141H430, 1141H460\u003c\/p\u003e\u003ch2\u003eChoose the crossover character\u003c\/h2\u003e\u003cp\u003eThe X-pipe merges the exhaust streams, while the H-pipe uses a balance connection between the banks. An X generally gives a smoother, higher-pitched character; an H generally favours a deeper tone. Your rear silencers remain a large part of the sound you hear.\u003c\/p\u003e\u003ch2\u003eMatch the cats to your engine\u003c\/h2\u003e\u003cp\u003eThe Performance-catted X-pipe is for a naturally aspirated setup. The GREEN X and H choices support forced induction. All three packages have 1-7\/8\" primaries and 3\" collectors, so the crossover and catalyst combination is what changes here.\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\u003e1141H420\u003c\/td\u003e\n\u003ctd\u003eHeader Size: 1-7\/8\"; Crossover Type: X Pipe; Cat Type: Performance Cats\u003c\/td\u003e\n\u003ctd\u003e1-7\/8\" headers; Performance Cats X-pipe\u003c\/td\u003e\n\u003ctd\u003eNaturally aspirated only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1141H430\u003c\/td\u003e\n\u003ctd\u003eHeader Size: 1-7\/8\"; Crossover Type: X Pipe; Cat Type: GREEN Cats\u003c\/td\u003e\n\u003ctd\u003e1-7\/8\" headers; GREEN Cats X-pipe\u003c\/td\u003e\n\u003ctd\u003eUse the SKU-specific vehicle rows below\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1141H460\u003c\/td\u003e\n\u003ctd\u003eHeader Size: 1-7\/8\"; Crossover Type: H Pipe; Cat Type: GREEN Cats\u003c\/td\u003e\n\u003ctd\u003e1-7\/8\" headers; GREEN Cats H-pipe\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\u003ctr\u003e\n\u003ctd\u003e2011-2014\u003c\/td\u003e\n\u003ctd\u003eFord Mustang GT\u003c\/td\u003e\n\u003ctd\u003e5.0L V8\u003c\/td\u003e\n\u003ctd\u003e1141H420, 1141H430, 1141H460\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\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\u003e1141H420, 1141H430, 1141H460\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003e2011-2014 Mustang GT 5.0L Coyote\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\u003eHeaders\u003c\/td\u003e\n\u003ctd\u003e1-7\/8\" primaries; 3\" collectors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear outlet\u003c\/td\u003e\n\u003ctd\u003e2-3\/4\" OEM interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChoices\u003c\/td\u003e\n\u003ctd\u003ePerformance X; GREEN X; GREEN H\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\u003eIs an H-pipe available with Performance cats?\u003c\/h3\u003e\u003cp\u003eThe H-pipe kit on this page uses GREEN cats. The Performance choice uses an X-pipe.\u003c\/p\u003e\u003ch3\u003eAre these for a 2012-2013 Boss 302 side-exhaust setup?\u003c\/h3\u003e\u003cp\u003eThe dedicated Boss 302 H-pipe kit has side-pipe connections. Choose that package when retaining that arrangement.\u003c\/p\u003e\u003ch2\u003eIntended use\u003c\/h2\u003e\u003cp\u003e1141H420: 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":"2026-10-08T10:41:16+01:00","handle":"kooks-2011-2014-ford-mustang-gt-5-0l-header-conn-kits-45485b84","updated_at":"2026-10-10T19:23:04+01:00","published_at":"2026-10-09T13:41:21+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":55646898585942,"product_id":11350210675030,"title":"1-7\/8\" \/ X Pipe \/ Performance Cats","price":"3129.41","sku":"1141H420","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"1-7\/8\"","option2":"X Pipe","option3":"Performance Cats","created_at":"2026-10-08T10:41:16+01:00","updated_at":"2026-10-10T19:23:04+01:00","taxable":true,"barcode":"842422179151","grams":25855,"image_id":null,"weight":25.855,"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":55646898618710,"product_id":11350210675030,"title":"1-7\/8\" \/ X Pipe \/ GREEN Cats","price":"3697.40","sku":"1141H430","position":2,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"1-7\/8\"","option2":"X Pipe","option3":"GREEN Cats","created_at":"2026-10-08T10:41:16+01:00","updated_at":"2026-10-10T19:23:04+01:00","taxable":true,"barcode":"842422179168","grams":26308,"image_id":null,"weight":26.308,"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":55646898651478,"product_id":11350210675030,"title":"1-7\/8\" \/ H Pipe \/ GREEN Cats","price":"3741.46","sku":"1141H460","position":3,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"1-7\/8\"","option2":"H Pipe","option3":"GREEN Cats","created_at":"2026-10-08T10:41:16+01:00","updated_at":"2026-10-10T19:23:04+01:00","taxable":true,"barcode":"842422179182","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":14512393126230,"product_id":11350210675030,"name":"Header Size","position":1,"values":["1-7\/8\""]},{"id":14512393158998,"product_id":11350210675030,"name":"Crossover Type","position":2,"values":["X Pipe","H Pipe"]},{"id":14512393191766,"product_id":11350210675030,"name":"Cat Type","position":3,"values":["Performance Cats","GREEN Cats"]}],"images":[{"id":86449223926102,"product_id":11350210675030,"position":1,"created_at":"2026-10-08T10:41:16+01:00","updated_at":"2026-10-08T10:41:20+01:00","alt":"Kooks 2011-2014 Ford Mustang GT 5.0L Header\/Connection Kits - 1141H420, 1141H430, 1141H460","width":3300,"height":2550,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/3d9ada136f4839272f5654461dd679d9_c7925aa2-427c-4466-af69-920b86bc0b50.jpg?v=1791452480","variant_ids":[]},{"id":86449223958870,"product_id":11350210675030,"position":2,"created_at":"2026-10-08T10:41:16+01:00","updated_at":"2026-10-08T10:41:19+01:00","alt":"Kooks 2011-2014 Ford Mustang GT 5.0L Header\/Connection Kits - 1141H420, 1141H430, 1141H460","width":1500,"height":1500,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/ec4adf57a815f14827836d8303aab65c_3a6996cc-2a90-4c9c-97d3-d82055e9cc34.jpg?v=1791452479","variant_ids":[]},{"id":86449223991638,"product_id":11350210675030,"position":3,"created_at":"2026-10-08T10:41:16+01:00","updated_at":"2026-10-08T10:41:18+01:00","alt":"Kooks 2011-2014 Ford Mustang GT 5.0L Header\/Connection Kits - 1141H420, 1141H430, 1141H460","width":1064,"height":1600,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/a4cfc316396ca4ccc50527f24189bce5_03152dd2-18a2-41d0-9846-da6d11def192.jpg?v=1791452478","variant_ids":[]},{"id":86449224024406,"product_id":11350210675030,"position":4,"created_at":"2026-10-08T10:41:16+01:00","updated_at":"2026-10-08T10:41:18+01:00","alt":"Kooks 2011-2014 Ford Mustang GT 5.0L Header\/Connection Kits - 1141H420, 1141H430, 1141H460","width":2406,"height":1600,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/ec367ae7e7103c33da0d31f62816ba20_571795eb-4618-411d-ba26-a34e677ae5da.jpg?v=1791452478","variant_ids":[]}],"image":{"id":86449223926102,"product_id":11350210675030,"position":1,"created_at":"2026-10-08T10:41:16+01:00","updated_at":"2026-10-08T10:41:20+01:00","alt":"Kooks 2011-2014 Ford Mustang GT 5.0L Header\/Connection Kits - 1141H420, 1141H430, 1141H460","width":3300,"height":2550,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/3d9ada136f4839272f5654461dd679d9_c7925aa2-427c-4466-af69-920b86bc0b50.jpg?v=1791452480","variant_ids":[]}}}