{"product_id":"kooks-2011-2014-shelby-gt500-5-4l-5-8l-header-conn-kit","title":"Kooks Shelby GT500 GREEN Header and Crossover Kits (2011-2014)","description":"\u003ch2\u003eChoose the sound and setup you want for your GT500\u003c\/h2\u003e\u003cp\u003eUpgrade your GT500 with Kooks long tube headers and a matching GREEN catted crossover. Choose 1-3\/4\" or 1-7\/8\" headers and an X-pipe or H-pipe, with all four combinations connecting to the 2-3\/4\" OEM rear interface. You can choose around both your engine build and the exhaust character you enjoy.\u003c\/p\u003e\u003cp\u003eSKUs: 1142H230, 1142H260, 1142H430, 1142H460\u003c\/p\u003e\u003ch2\u003eX-pipe or H-pipe\u003c\/h2\u003e\u003cp\u003eAn X-pipe merges the two exhaust streams; an H-pipe uses a balance connection between them. In general, the X layout favours a smoother, higher-pitched character, while the H layout is associated with a deeper muscle-car tone. Your rear silencers still play a large part in the final sound.\u003c\/p\u003e\u003ch2\u003eTwo primary sizes, four real combinations\u003c\/h2\u003e\u003cp\u003eThe 1-3\/4\" and 1-7\/8\" header choices both use 3\" collectors. Each is available with either crossover, and all use GREEN cats. Choose the primary size for your 5.4 or 5.8 build, rather than treating the larger option as an automatic improvement for every car.\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\u003e1142H230\u003c\/td\u003e\n\u003ctd\u003eHeader Size: 1-3\/4\"; Crossover Type: X Pipe\u003c\/td\u003e\n\u003ctd\u003e1-3\/4\" headers;  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\u003e1142H260\u003c\/td\u003e\n\u003ctd\u003eHeader Size: 1-3\/4\"; Crossover Type: H Pipe\u003c\/td\u003e\n\u003ctd\u003e1-3\/4\" headers;  H-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\u003e1142H430\u003c\/td\u003e\n\u003ctd\u003eHeader Size: 1-7\/8\"; Crossover Type: X Pipe\u003c\/td\u003e\n\u003ctd\u003e1-7\/8\" headers;  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\u003e1142H460\u003c\/td\u003e\n\u003ctd\u003eHeader Size: 1-7\/8\"; Crossover Type: H Pipe\u003c\/td\u003e\n\u003ctd\u003e1-7\/8\" headers;  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\u003eMatching products\u003c\/h2\u003e\u003cp\u003eFor the 2013-2014 GT500 5.8, the \u003ca href=\"https:\/\/hooniesadrenaline.co.uk\/products\/kooks-11434200?variant=55646900060502\"\u003eKooks quad-tip cat-back\u003c\/a\u003e adds the rear system, oval mufflers and polished tips. It is the later 5.8-litre application, with the matching 2-3\/4\" front inlet.\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\u003e2011-2012\u003c\/td\u003e\n\u003ctd\u003eFord Mustang Shelby GT500\u003c\/td\u003e\n\u003ctd\u003e5.4L V8\u003c\/td\u003e\n\u003ctd\u003e1142H230, 1142H260, 1142H430, 1142H460\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2013-2014\u003c\/td\u003e\n\u003ctd\u003eFord Mustang Shelby GT500\u003c\/td\u003e\n\u003ctd\u003e5.8L V8\u003c\/td\u003e\n\u003ctd\u003e1142H230, 1142H260, 1142H430, 1142H460\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\u003e1142H230, 1142H260, 1142H430, 1142H460\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003e2011-2012 GT500 5.4L; 2013-2014 GT500 5.8L\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\u003ePrimary sizes\u003c\/td\u003e\n\u003ctd\u003e1-3\/4\" or 1-7\/8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCollectors\/crossover\u003c\/td\u003e\n\u003ctd\u003e3\" collectors; GREEN catted X-pipe or H-pipe\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\u003eSelectable combinations\u003c\/td\u003e\n\u003ctd\u003eBoth header sizes with either X or H crossover\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\u003eAre all four choices GREEN catted?\u003c\/h3\u003e\u003cp\u003eYes. The choices on this page vary the primary size and crossover layout, not the catalyst family.\u003c\/p\u003e\u003ch3\u003eWhich crossover will sound better?\u003c\/h3\u003e\u003cp\u003eChoose the character you prefer. An H-pipe generally has a deeper character; an X-pipe generally sounds smoother and higher pitched. Rear silencers and the rest of your exhaust also affect what you hear.\u003c\/p\u003e\u003ch3\u003eDo you recommend tuning with these headers?\u003c\/h3\u003e\u003cp\u003eWe recommend tuning with every header installation. \u003ca href=\"https:\/\/hooniesadrenaline.co.uk\/pages\/contact\"\u003eTalk to us\u003c\/a\u003e about calibration for your vehicle, exhaust and other modifications.\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","brand":"Kooks","offers":[{"title":"1-3\/4\" \/ X Pipe","offer_id":55646899732822,"sku":"1142H230","price":3914.11,"currency_code":"GBP","in_stock":true},{"title":"1-3\/4\" \/ H Pipe","offer_id":55646899765590,"sku":"1142H260","price":4025.84,"currency_code":"GBP","in_stock":true},{"title":"1-7\/8\" \/ X Pipe","offer_id":55646899798358,"sku":"1142H430","price":4086.0,"currency_code":"GBP","in_stock":true},{"title":"1-7\/8\" \/ H Pipe","offer_id":55646899831126,"sku":"1142H460","price":4197.74,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/86b106cf04c557b46b128d949ff17437_d6e6aeb9-d1dd-460d-b6d3-16823caf056f.jpg?v=1791452482","url":"https:\/\/hooniesadrenaline.co.uk\/products\/kooks-2011-2014-shelby-gt500-5-4l-5-8l-header-conn-kit","provider":"Hoonies Adrenaline","version":"1.0","type":"link"}