{"product":{"id":11350211264854,"title":"Kooks Shelby GT500 X-Pipe \/ H-Pipe Connections (2011-2014)","body_html":"\u003ch2\u003eChoose the crossover for your supercharged Shelby\u003c\/h2\u003e\u003cp\u003eComplete your GT500 header installation with the crossover and catalyst arrangement you want. These Kooks connections offer X-pipe or H-pipe layouts, in GREEN-catted or uncatted Competition Only form. Both layouts join the factory-style rear exhaust through 2-3\/4\" outlets.\u003c\/p\u003e\u003cp\u003eSKUs: 11423100, 11423300, 11423400, 11423600\u003c\/p\u003e\u003ch2\u003eFour real configurations\u003c\/h2\u003e\u003cp\u003eChoose 11423100 for an uncatted X-pipe or 11423300 for a GREEN X-pipe. The H-pipe choices are uncatted 11423400 and GREEN 11423600. The GREEN cats use a 400-cell substrate and suit forced induction.\u003c\/p\u003e\u003ch2\u003eFit the complete front system\u003c\/h2\u003e\u003cp\u003eThe 3\" pipework uses ball-and-socket connections to Kooks long tube headers. Front clamps are included, while the rear joint reuses the original OEM clamps, purchased separately if replacements are needed.\u003c\/p\u003e\u003ch2\u003eChoose the sound you enjoy\u003c\/h2\u003e\u003cp\u003eAn X-pipe typically gives a smoother, higher-pitched exhaust note. An H-pipe brings the deeper, classic muscle-car sound. Your choice of cats and rear mufflers also shapes what you hear from your GT500.\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\u003e11423100\u003c\/td\u003e\n\u003ctd\u003eCat Type: Comp. Only; Crossover Type: X Pipe\u003c\/td\u003e\n\u003ctd\u003eCompetition Only X-pipe; front clamps included; rear OEM clamps reused.\u003c\/td\u003e\n\u003ctd\u003eUncatted; competition use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e11423300\u003c\/td\u003e\n\u003ctd\u003eCat Type: GREEN Cats; Crossover Type: X Pipe\u003c\/td\u003e\n\u003ctd\u003eGREEN X-pipe, 400-cell cats suitable for forced induction; front clamps included; rear OEM clamps reused.\u003c\/td\u003e\n\u003ctd\u003eMatch the vehicle and engine rows below\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e11423400\u003c\/td\u003e\n\u003ctd\u003eCat Type: Comp. Only; Crossover Type: H Pipe\u003c\/td\u003e\n\u003ctd\u003eCompetition Only H-pipe; front clamps included; rear OEM clamps reused.\u003c\/td\u003e\n\u003ctd\u003eUncatted; competition use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e11423600\u003c\/td\u003e\n\u003ctd\u003eCat Type: GREEN Cats; Crossover Type: H Pipe\u003c\/td\u003e\n\u003ctd\u003eGREEN H-pipe, 400-cell cats suitable for forced induction; front clamps included; rear OEM clamps reused.\u003c\/td\u003e\n\u003ctd\u003eMatch the vehicle and engine rows below\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch2\u003eMatching products\u003c\/h2\u003e\u003cp\u003eThe \u003ca href=\"https:\/\/hooniesadrenaline.co.uk\/products\/kooks-2011-2014-shelby-gt500-5-4l-5-8l-headers?variant=55646898946390\"\u003e2011-2014 GT500 headers\u003c\/a\u003e have 3-inch collectors for these crossovers, within the listed 5.4\/5.8 GT500 years.\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\u003e11423100, 11423300, 11423400, 11423600\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\u003e11423100, 11423300, 11423400, 11423600\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\u003e11423100, 11423300, 11423400, 11423600\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\u003e16-gauge 304 stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFront \/ OEM outlet\u003c\/td\u003e\n\u003ctd\u003e3\" \/ 2-3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCrossovers\u003c\/td\u003e\n\u003ctd\u003eX-pipe or H-pipe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGREEN cats\u003c\/td\u003e\n\u003ctd\u003e400-cell; suitable for forced induction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClamps\u003c\/td\u003e\n\u003ctd\u003eFront supplied; rear OEM clamps not included\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\u003eDo both layouts fit the factory-style rear exhaust?\u003c\/h3\u003e\u003cp\u003eYes. Both have the 2-3\/4\" OEM rear outlet for the GT500 applications.\u003c\/p\u003e\u003ch3\u003eDoes choosing the H-pipe change the header requirement?\u003c\/h3\u003e\u003cp\u003eBoth layouts require matching Kooks long tube headers.\u003c\/p\u003e\u003ch2\u003eIntended use\u003c\/h2\u003e\u003cp\u003e11423100, 11423400: Competition, off-road and track use only. Not for use on public roads.\u003c\/p\u003e\u003cp\u003eThe competition-use waiver applies to 11423100, 11423400.\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 Pipes","created_at":"2026-10-08T10:41:18+01:00","handle":"kooks-2011-2014-shelby-gt500-5-4l-5-8l-connection-pipes","updated_at":"2026-10-11T14:09:55+01:00","published_at":"2026-10-09T13:41:02+01:00","template_suffix":null,"published_scope":"global","tags":"brand:kooks, cat:exhausts, dept:performance-parts, fits:ford-mustang, make:ford, type:exhaust-pipe","variants":[{"id":55646899241302,"product_id":11350211264854,"title":"Comp. Only \/ X Pipe","price":"1255.51","sku":"11423100","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"Comp. Only","option2":"X Pipe","option3":null,"created_at":"2026-10-08T10:41:18+01:00","updated_at":"2026-10-11T14:09:55+01:00","taxable":true,"barcode":"842422156602","grams":9979,"image_id":null,"weight":9.979,"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":55646899274070,"product_id":11350211264854,"title":"GREEN Cats \/ X Pipe","price":"2107.49","sku":"11423300","position":2,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"GREEN Cats","option2":"X Pipe","option3":null,"created_at":"2026-10-08T10:41:18+01:00","updated_at":"2026-10-11T14:09:55+01:00","taxable":true,"barcode":"842422156688","grams":11793,"image_id":null,"weight":11.793,"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":55646899306838,"product_id":11350211264854,"title":"Comp. Only \/ H Pipe","price":"1367.24","sku":"11423400","position":3,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"Comp. Only","option2":"H Pipe","option3":null,"created_at":"2026-10-08T10:41:18+01:00","updated_at":"2026-10-11T14:09:55+01:00","taxable":true,"barcode":"842422156725","grams":9979,"image_id":null,"weight":9.979,"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":55646899339606,"product_id":11350211264854,"title":"GREEN Cats \/ H Pipe","price":"2219.21","sku":"11423600","position":4,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"GREEN Cats","option2":"H Pipe","option3":null,"created_at":"2026-10-08T10:41:18+01:00","updated_at":"2026-10-11T14:09:55+01:00","taxable":true,"barcode":"842422156817","grams":12247,"image_id":null,"weight":12.247,"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":14512393978198,"product_id":11350211264854,"name":"Cat Type","position":1,"values":["Comp. 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