{"product":{"id":11350215557462,"title":"Kooks Grand Cherokee SRT8 6.1 Header Kit (2006-2010) | 3400H420","body_html":"\u003ch2\u003eUpgrade your SRT8 headers and front connections together\u003c\/h2\u003e\u003cp\u003ePair your 6.1-litre Grand Cherokee SRT8 with Kooks stainless long tube headers and matching Performance-catted connections. This combined kit joins the 3\" OEM rear exhaust, upgrading the front system while retaining a compatible cat-back.\u003c\/p\u003e\u003cp\u003eSKU: 3400H420\u003c\/p\u003e\u003ch2\u003eThe full front conversion in one purchase\u003c\/h2\u003e\u003cp\u003eThe 1-7\/8\" primaries feed 3\" collectors and the supplied 3\" catted connections. Both the header sizing and rear connection are specified for the 2006-2010 SRT8 6.1 application.\u003c\/p\u003e\u003ch2\u003eFor a naturally aspirated HEMI\u003c\/h2\u003e\u003cp\u003eThe supplied Performance cats are specified for naturally aspirated use. If your 6.1 has a supercharger or turbocharger, choose a catalyst arrangement suitable for that setup rather than treating all catted kits as interchangeable.\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\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\u003e2006-2010\u003c\/td\u003e\n\u003ctd\u003eJeep Grand Cherokee SRT8\u003c\/td\u003e\n\u003ctd\u003e6.1L V8\u003c\/td\u003e\n\u003ctd\u003e3400H420\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\u003e3400H420\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003e2006-2010 Jeep Grand Cherokee SRT8 6.1L V8\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; 3\" pipework\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\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eIs this for the later 6.4-litre Jeep?\u003c\/h3\u003e\u003cp\u003eThis is the 2006-2010 6.1-litre SRT8 package.\u003c\/p\u003e\u003ch3\u003eDoes it include the catted pipes?\u003c\/h3\u003e\u003cp\u003eYes. The headers and Performance-catted front connections are supplied together.\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":"2026-10-08T10:41:33+01:00","handle":"kooks-2006-2010-jeep-wk1-grand-cherokee-srt8-header-conn-kits","updated_at":"2026-10-10T21:30:25+01:00","published_at":"2026-10-09T13:38:36+01:00","template_suffix":null,"published_scope":"global","tags":"brand:kooks, cat:exhausts, dept:performance-parts, fits:jeep-grand-cherokee, make:jeep, type:header-kit","variants":[{"id":55646904779094,"product_id":11350215557462,"title":"Performance Cats","price":"3381.26","sku":"3400H420","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"Performance Cats","option2":null,"option3":null,"created_at":"2026-10-08T10:41:33+01:00","updated_at":"2026-10-10T21:30:25+01:00","taxable":true,"barcode":"842422162511","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":14512399221078,"product_id":11350215557462,"name":"Cat Type","position":1,"values":["Performance Cats"]}],"images":[{"id":86449277174102,"product_id":11350215557462,"position":1,"created_at":"2026-10-08T10:41:33+01:00","updated_at":"2026-10-08T10:41:36+01:00","alt":"Kooks 1-7\/8\" Stainless Headers \u0026 Catted OEM Connection Pipes. 2006-2010 Jeep SRT8 6.1L","width":2397,"height":1600,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/c27e4d9e685c9114f11c13c1ce761d48_d3b628b7-33a3-423b-b879-6652bcffee90.jpg?v=1791452496","variant_ids":[]},{"id":86449277206870,"product_id":11350215557462,"position":2,"created_at":"2026-10-08T10:41:33+01:00","updated_at":"2026-10-08T10:41:36+01:00","alt":"Kooks 1-7\/8\" Stainless Headers \u0026 Catted OEM Connection Pipes. 2006-2010 Jeep SRT8 6.1L","width":1500,"height":1500,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/edfec6be4e0f083fd2bd9fe64427b1de_3c46984d-2e99-4dd6-bc2a-a0c434da9d3f.jpg?v=1791452496","variant_ids":[]}],"image":{"id":86449277174102,"product_id":11350215557462,"position":1,"created_at":"2026-10-08T10:41:33+01:00","updated_at":"2026-10-08T10:41:36+01:00","alt":"Kooks 1-7\/8\" Stainless Headers \u0026 Catted OEM Connection Pipes. 2006-2010 Jeep SRT8 6.1L","width":2397,"height":1600,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/c27e4d9e685c9114f11c13c1ce761d48_d3b628b7-33a3-423b-b879-6652bcffee90.jpg?v=1791452496","variant_ids":[]}}}