{"product":{"id":11350216999254,"title":"Kooks Jeep SRT \/ Durango SRT 6.4 Header Kit (2012-2020) | 3410H421","body_html":"\u003ch2\u003eBring out the character of your naturally aspirated 6.4 HEMI\u003c\/h2\u003e\u003cp\u003eGive your SRT a coordinated Kooks front exhaust upgrade with 1-7\/8\" long tube headers and Performance-catted connections. The 3\" pipework joins the OEM rear exhaust, making this a combined header-and-connection purchase for the supported naturally aspirated 6.4-litre Jeep and Durango applications.\u003c\/p\u003e\u003cp\u003eSKU: 3410H421\u003c\/p\u003e\u003ch2\u003eA matched front system for the 6.4\u003c\/h2\u003e\u003cp\u003eThe headers use 3\" collectors and the supplied connections have 3\" OEM rear outlets. You can keep the rear exhaust that suits your SRT while upgrading the front of the system.\u003c\/p\u003e\u003ch2\u003eChoose the correct engine application\u003c\/h2\u003e\u003cp\u003eThis Performance-catted package is for naturally aspirated 6.4-litre engines. The fitment table covers Grand Cherokee SRT\/SRT8 within 2012-2020 and Durango SRT within 2018-2020. Supercharged Trackhawk and Hellcat applications need an appropriate forced-induction catalyst package.\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\n\u003ctr\u003e\n\u003ctd\u003e2018-2020\u003c\/td\u003e\n\u003ctd\u003eDodge Durango SRT\u003c\/td\u003e\n\u003ctd\u003e6.4L V8\u003c\/td\u003e\n\u003ctd\u003e3410H421\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2012-2015\u003c\/td\u003e\n\u003ctd\u003eJeep Grand Cherokee SRT8\u003c\/td\u003e\n\u003ctd\u003e6.4L V8\u003c\/td\u003e\n\u003ctd\u003e3410H421\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2014-2020\u003c\/td\u003e\n\u003ctd\u003eJeep Grand Cherokee SRT\u003c\/td\u003e\n\u003ctd\u003e6.4L V8\u003c\/td\u003e\n\u003ctd\u003e3410H421\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\u003eSKU\u003c\/td\u003e\n\u003ctd\u003e3410H421\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEngine\u003c\/td\u003e\n\u003ctd\u003e6.4L naturally aspirated HEMI V8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplications\u003c\/td\u003e\n\u003ctd\u003eGrand Cherokee SRT\/SRT8 2012-2020; Durango SRT 2018-2020\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\" OEM rear outlets\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 the Trackhawk kit?\u003c\/h3\u003e\u003cp\u003eChoose a forced-induction catalyst package for a supercharged Trackhawk. This Performance-catted kit is for the listed naturally aspirated 6.4 applications.\u003c\/p\u003e\u003ch3\u003eAre the connections supplied with the headers?\u003c\/h3\u003e\u003cp\u003eYes. The Performance-catted front connections are part of 3410H421.\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\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":"2026-10-08T10:41:39+01:00","handle":"kooks-2012-2020-grand-cherokee-durango-6-4l-6-2l-header-conn-kits-87c06638","updated_at":"2026-10-10T17:51:22+01:00","published_at":"2026-10-09T13:37:35+01:00","template_suffix":null,"published_scope":"global","tags":"brand:kooks, cat:exhausts, dept:performance-parts, fits:dodge-durango, fits:jeep-grand-cherokee, make:dodge, make:jeep, type:header-kit","variants":[{"id":55646908252502,"product_id":11350216999254,"title":"1-7\/8\" \/ Performance Cats","price":"3518.80","sku":"3410H421","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"1-7\/8\"","option2":"Performance Cats","option3":null,"created_at":"2026-10-08T10:41:39+01:00","updated_at":"2026-10-10T17:51:22+01:00","taxable":true,"barcode":"842422173159","grams":22680,"image_id":null,"weight":22.68,"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":14512400826710,"product_id":11350216999254,"name":"Header Size","position":1,"values":["1-7\/8\""]},{"id":14512400859478,"product_id":11350216999254,"name":"Cat Type","position":2,"values":["Performance Cats"]}],"images":[{"id":86449296671062,"product_id":11350216999254,"position":1,"created_at":"2026-10-08T10:41:39+01:00","updated_at":"2026-10-08T10:41:42+01:00","alt":"Kooks 1-7\/8\" Stainless Headers \u0026 Catted OEM Conn. 2012-2020 Jeep\/Durango 6.4L","width":1500,"height":1500,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/3b1499841e147f42e6db9ad2b7342d6b_9f8a3786-8774-4c8f-b7a8-b79bf701e40f.jpg?v=1791452502","variant_ids":[]},{"id":86449296703830,"product_id":11350216999254,"position":2,"created_at":"2026-10-08T10:41:39+01:00","updated_at":"2026-10-08T10:41:43+01:00","alt":"Kooks 1-7\/8\" Stainless Headers \u0026 Catted OEM Conn. 2012-2020 Jeep\/Durango 6.4L","width":1500,"height":1500,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/36d3340b762f207417fe96c9d62ef049_489076bb-7196-40e8-8041-868d5c28df5d.jpg?v=1791452503","variant_ids":[]},{"id":86449296736598,"product_id":11350216999254,"position":3,"created_at":"2026-10-08T10:41:39+01:00","updated_at":"2026-10-08T10:41:42+01:00","alt":"Kooks 1-7\/8\" Stainless Headers \u0026 Catted OEM Conn. 2012-2020 Jeep\/Durango 6.4L","width":1500,"height":1500,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/59a07b40deafca2a65c72e1cf94d0034_90ea783f-34e4-4932-998e-be43d80d642b.jpg?v=1791452502","variant_ids":[]},{"id":86449296769366,"product_id":11350216999254,"position":4,"created_at":"2026-10-08T10:41:39+01:00","updated_at":"2026-10-08T10:41:42+01:00","alt":"Kooks 1-7\/8\" Stainless Headers \u0026 Catted OEM Conn. 2012-2020 Jeep\/Durango 6.4L","width":800,"height":800,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/51ae1720641e9340824957b02946fc0f_1b96f47b-7bf7-439a-b670-7fca16285ecc.jpg?v=1791452502","variant_ids":[]},{"id":86449296802134,"product_id":11350216999254,"position":5,"created_at":"2026-10-08T10:41:39+01:00","updated_at":"2026-10-08T10:41:42+01:00","alt":"Kooks 1-7\/8\" Stainless Headers \u0026 Catted OEM Conn. 2012-2020 Jeep\/Durango 6.4L","width":800,"height":800,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/51ae1720641e9340824957b02946fc0f_51ff342b-6050-4ece-aed6-fe8ffb351c22.jpg?v=1791452502","variant_ids":[]},{"id":86449296834902,"product_id":11350216999254,"position":6,"created_at":"2026-10-08T10:41:39+01:00","updated_at":"2026-10-08T10:41:43+01:00","alt":"Kooks 1-7\/8\" Stainless Headers \u0026 Catted OEM Conn. 2012-2020 Jeep\/Durango 6.4L","width":1500,"height":1500,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/64974514b1185554d349ca8c5f50c5d3_66de7013-53b6-41d5-998e-8f853eda3df1.jpg?v=1791452503","variant_ids":[]}],"image":{"id":86449296671062,"product_id":11350216999254,"position":1,"created_at":"2026-10-08T10:41:39+01:00","updated_at":"2026-10-08T10:41:42+01:00","alt":"Kooks 1-7\/8\" Stainless Headers \u0026 Catted OEM Conn. 2012-2020 Jeep\/Durango 6.4L","width":1500,"height":1500,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/3b1499841e147f42e6db9ad2b7342d6b_9f8a3786-8774-4c8f-b7a8-b79bf701e40f.jpg?v=1791452502","variant_ids":[]}}}