{"product":{"id":11354626228566,"title":"Kooks Mustang GT \/ Dark Horse RHD Header Kits (2024-2026)","body_html":"\u003ch2\u003eA complete exhaust upgrade for your RHD Mustang\u003c\/h2\u003e\u003cp\u003eBring out more of your Mustang's V8 character with a front exhaust package put together for right-hand-drive S650 cars. Our bundle combines Kooks 1-7\/8\" headers, your chosen 3\" connection pipes and both adapters for the factory rear exhaust. You can choose the catalyst arrangement around your build, with the main components already matched.\u003c\/p\u003e\u003cp\u003eSKUs: HA-KOOKS-S650-RHD-11513100, HA-KOOKS-S650-RHD-11513300, HA-KOOKS-S650-RHD-11513400\u003c\/p\u003e\u003ch2\u003eHeaders, connections and adapters together\u003c\/h2\u003e\u003cp\u003eEvery bundle includes 11552400 right-hand-drive headers, their gaskets, bolt kit and O2 extensions, plus the 11513000-2 adapter pair. The adapters take the 3\" front pipes to the 2-1\/4\" OEM rear interface. Clamps are purchased separately.\u003c\/p\u003e\u003ch2\u003eChoose the cats for your engine\u003c\/h2\u003e\u003cp\u003eGREEN connections use 400-cell cats suitable for forced induction. H.O. GREEN uses a 4-1\/2\" 300-cell substrate. Competition Only supplies uncatted pipes. The included headers carry a competition-use restriction, which applies to every bundle option, including the catted choices.\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\u003eHA-KOOKS-S650-RHD-11513100\u003c\/td\u003e\n\u003ctd\u003eConnection Pipes: Comp. Only\u003c\/td\u003e\n\u003ctd\u003e11552400 headers + 11513100 uncatted pipes + 11513000-2 adapter pair; clamps separate.\u003c\/td\u003e\n\u003ctd\u003eRight-hand drive only; 5.0L S650; clamps separate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHA-KOOKS-S650-RHD-11513300\u003c\/td\u003e\n\u003ctd\u003eConnection Pipes: GREEN Cats\u003c\/td\u003e\n\u003ctd\u003e11552400 headers + 11513300 400-cell GREEN pipes + 11513000-2 adapter pair; clamps separate.\u003c\/td\u003e\n\u003ctd\u003eRight-hand drive only; 5.0L S650; clamps separate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHA-KOOKS-S650-RHD-11513400\u003c\/td\u003e\n\u003ctd\u003eConnection Pipes: H.O. GREEN Cats\u003c\/td\u003e\n\u003ctd\u003e11552400 headers + 11513400 H.O. GREEN pipes, 4-1\/2\" 300-cell substrate + 11513000-2 adapter pair; clamps separate.\u003c\/td\u003e\n\u003ctd\u003eRight-hand drive only; 5.0L S650; clamps separate\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. We offer \u003ca href=\"https:\/\/hooniesadrenaline.co.uk\/products\/ford-mustang-gt-s650-5-0l-v8-ecu-remap-2024-stage-1-custom-tuning\"\u003eMustang GT Stage 1 tuning\u003c\/a\u003e and \u003ca href=\"https:\/\/hooniesadrenaline.co.uk\/products\/ford-mustang-dark-horse-s650-5-0l-v8-ecu-tuning-2024-custom-mustang-dark-horse-remap\"\u003eDark Horse Stage 1 tuning\u003c\/a\u003e for 2024+ S650s. \u003ca href=\"https:\/\/hooniesadrenaline.co.uk\/pages\/contact\"\u003eTalk to us\u003c\/a\u003e about your header upgrade so we can arrange a calibration for the modified exhaust.\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\u003e2024-2026\u003c\/td\u003e\n\u003ctd\u003eFord Mustang GT \/ Dark Horse S650\u003c\/td\u003e\n\u003ctd\u003e5.0L V8\u003c\/td\u003e\n\u003ctd\u003eHA-KOOKS-S650-RHD-11513100, HA-KOOKS-S650-RHD-11513300, HA-KOOKS-S650-RHD-11513400\u003c\/td\u003e\n\u003ctd\u003eRight-hand drive only; 5.0L S650; clamps separate\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\u003eHA-KOOKS-S650-RHD-11513100, HA-KOOKS-S650-RHD-11513300, HA-KOOKS-S650-RHD-11513400\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003e2024-2026 Mustang GT \/ Dark Horse 5.0L; right-hand drive only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\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\u003e11552400; 1-7\/8\" primaries, 3\" outlets\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdapters\u003c\/td\u003e\n\u003ctd\u003e11513000-2; one pair, 3\" inlet to 2-1\/4\" OEM outlet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeader fitting parts\u003c\/td\u003e\n\u003ctd\u003eGaskets, bolt kit and O2 extensions included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClamps\u003c\/td\u003e\n\u003ctd\u003ePurchased separately\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 keep the factory rear exhaust?\u003c\/h3\u003e\u003cp\u003eYes. Both OEM adapters are included for a rear system using the compatible factory connection.\u003c\/p\u003e\u003ch3\u003eAre the components the same in every bundle?\u003c\/h3\u003e\u003cp\u003eThe headers and adapter pair are the same. Your selection changes the front connection pipes and catalyst arrangement.\u003c\/p\u003e\u003ch2\u003eIntended use\u003c\/h2\u003e\u003cp\u003eHA-KOOKS-S650-RHD-11513100, HA-KOOKS-S650-RHD-11513300, HA-KOOKS-S650-RHD-11513400: Competition, off-road and track use only. Not for use on public roads.\u003c\/p\u003e\u003cp\u003eThe competition-use waiver applies to HA-KOOKS-S650-RHD-11513100, HA-KOOKS-S650-RHD-11513300, HA-KOOKS-S650-RHD-11513400.\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":"2026-10-09T18:01:30+01:00","handle":"kooks-2024-mustang-gt-dark-horse-5-0l-rhd-header-kit","updated_at":"2026-10-10T22:32:37+01:00","published_at":"2026-10-10T08:18:40+01:00","template_suffix":null,"published_scope":"web","tags":"brand:kooks, cat:exhausts, dept:performance-parts, fits:ford-mustang, fits:ford-mustang-s650-dark-horse-2024-plus, fits:ford-mustang-s650-gt-2024-2026-right-hand-drive, make:ford, type:header-kit","variants":[{"id":55670837215574,"product_id":11354626228566,"title":"Comp. Only","price":"2529.79","sku":"HA-KOOKS-S650-RHD-11513100","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"Comp. Only","option2":null,"option3":null,"created_at":"2026-10-09T18:01:30+01:00","updated_at":"2026-10-10T22:32:37+01:00","taxable":true,"barcode":null,"grams":0,"image_id":null,"weight":0.0,"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":55670837248342,"product_id":11354626228566,"title":"GREEN Cats","price":"3381.77","sku":"HA-KOOKS-S650-RHD-11513300","position":2,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"GREEN Cats","option2":null,"option3":null,"created_at":"2026-10-09T18:01:30+01:00","updated_at":"2026-10-10T22:32:37+01:00","taxable":true,"barcode":null,"grams":0,"image_id":null,"weight":0.0,"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":55670837281110,"product_id":11354626228566,"title":"H.O. GREEN Cats","price":"3902.42","sku":"HA-KOOKS-S650-RHD-11513400","position":3,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"H.O. GREEN Cats","option2":null,"option3":null,"created_at":"2026-10-09T18:01:30+01:00","updated_at":"2026-10-10T22:32:37+01:00","taxable":true,"barcode":null,"grams":0,"image_id":null,"weight":0.0,"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":14518032826710,"product_id":11354626228566,"name":"Connection Pipes","position":1,"values":["Comp. Only","GREEN Cats","H.O. 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