{"product":{"id":11350219424086,"title":"Kooks Pontiac GTO LS2 Header Kit (2005-2006) | 2412H420","body_html":"\u003ch2\u003eMake more of your LS2 GTO\u003c\/h2\u003e\u003cp\u003eUpgrade your 6.0-litre GTO with Kooks 1-7\/8\" stainless long tube headers and a matched Performance-catted front connection set. This package joins the 3\" OEM rear interface on the 2005-2006 LS2 car.\u003c\/p\u003e\u003cp\u003eSKU: 2412H420\u003c\/p\u003e\u003ch2\u003eA 3-inch rear connection for the LS2\u003c\/h2\u003e\u003cp\u003eThe headers use 3\" collectors and the supplied front pipes retain 3\" OEM rear outlets. That is the key connection difference from the 2004 LS1 package, which uses 2-1\/2\" outlets.\u003c\/p\u003e\u003cp\u003eInstallation requires removal of the original driver-side heat shield. The passenger-side shield does not need to be removed.\u003c\/p\u003e\u003ch2\u003eHeaders and front cats bought together\u003c\/h2\u003e\u003cp\u003eThe combined package gives you the headers and their matching catted connections for a naturally aspirated LS2. Keep a rear exhaust using the factory interface, or pair it with a compatible rear system when planning a larger exhaust change.\u003c\/p\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\u003eComplete the rear of your LS2 exhaust with the \u003ca href=\"https:\/\/hooniesadrenaline.co.uk\/products\/kooks-24124200?variant=55646913495382\"\u003e2005-2006 GTO 3-inch cat-back\u003c\/a\u003e if you want the rear system and polished tips as well.\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\u003e2005-2006\u003c\/td\u003e\n\u003ctd\u003ePontiac GTO Base\u003c\/td\u003e\n\u003ctd\u003e6.0L V8\u003c\/td\u003e\n\u003ctd\u003e2412H420\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\u003eSKU\u003c\/td\u003e\n\u003ctd\u003e2412H420\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003e2005-2006 Pontiac GTO LS2 6.0L\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\u003eConnections\u003c\/td\u003e\n\u003ctd\u003ePerformance-catted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear outlet\u003c\/td\u003e\n\u003ctd\u003e3\" OEM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCatalyst condition\u003c\/td\u003e\n\u003ctd\u003eNaturally aspirated only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitting change\u003c\/td\u003e\n\u003ctd\u003eOriginal driver-side heat shield removed\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\u003eDoes this use the 2004 GTO rear outlet size?\u003c\/h3\u003e\u003cp\u003eThe LS2 kit has 3\" OEM outlets. The 2004 LS1 kit has 2-1\/2\" outlets.\u003c\/p\u003e\u003ch3\u003eCan I use the supplied cats with a supercharger?\u003c\/h3\u003e\u003cp\u003ePerformance cats are specified for naturally aspirated engines. Choose a forced-induction catalyst arrangement for a supercharged build.\u003c\/p\u003e\u003ch2\u003eIntended use\u003c\/h2\u003e\u003cp\u003eCompetition, 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":"2026-10-08T10:41:50+01:00","handle":"kooks-2412h420","updated_at":"2026-10-10T19:09:36+01:00","published_at":"2026-10-09T13:35:59+01:00","template_suffix":null,"published_scope":"global","tags":"brand:kooks, cat:exhausts, dept:performance-parts, fits:pontiac-gto, make:pontiac, type:header-kit","variants":[{"id":55646913659222,"product_id":11350219424086,"title":"Default Title","price":"2790.13","sku":"2412H420","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"Default Title","option2":null,"option3":null,"created_at":"2026-10-08T10:41:50+01:00","updated_at":"2026-10-10T19:09:36+01:00","taxable":true,"barcode":"842422178796","grams":27216,"image_id":null,"weight":27.216,"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":14512403644758,"product_id":11350219424086,"name":"Title","position":1,"values":["Default Title"]}],"images":[{"id":86449317314902,"product_id":11350219424086,"position":1,"created_at":"2026-10-08T10:41:50+01:00","updated_at":"2026-10-08T10:41:53+01:00","alt":"Kooks 1-7\/8\" Header and Catted Connection Kit. 2005-2006 Pontiac GTO LS2 6.0L.","width":1500,"height":1500,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/e438ffb42ad74d08c6ccea72b48048e4_0a61c7d9-169d-4c02-b697-03e9aba3b0fa.jpg?v=1791452513","variant_ids":[]},{"id":86449317347670,"product_id":11350219424086,"position":2,"created_at":"2026-10-08T10:41:50+01:00","updated_at":"2026-10-08T10:41:53+01:00","alt":"Kooks 1-7\/8\" Header and Catted Connection Kit. 2005-2006 Pontiac GTO LS2 6.0L.","width":1500,"height":1500,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/5ca06e47a605cebbcf45b0499e1c4446_f919c4eb-9479-42d8-8617-7a4009e53263.jpg?v=1791452513","variant_ids":[]}],"image":{"id":86449317314902,"product_id":11350219424086,"position":1,"created_at":"2026-10-08T10:41:50+01:00","updated_at":"2026-10-08T10:41:53+01:00","alt":"Kooks 1-7\/8\" Header and Catted Connection Kit. 2005-2006 Pontiac GTO LS2 6.0L.","width":1500,"height":1500,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/e438ffb42ad74d08c6ccea72b48048e4_0a61c7d9-169d-4c02-b697-03e9aba3b0fa.jpg?v=1791452513","variant_ids":[]}}}