{"product":{"id":11350206120278,"title":"Kooks GM 1500 6.2L Ultra-GREEN Header and Y-Pipe Kit (2019-2023) | 2863H300","body_html":"\u003ch2\u003eUpgrade your V8 with the front exhaust already matched\u003c\/h2\u003e\u003cp\u003eEnjoy a substantial front exhaust upgrade without piecing together a header and Y-pipe combination yourself. This Kooks kit combines 1-3\/4\" long tube headers with an Ultra-GREEN catted Y-pipe and joins the 3-1\/2\" OEM rear interface. Gaskets and the bolt kit are included for the installation.\u003c\/p\u003e\u003cp\u003eSKU: 2863H300\u003c\/p\u003e\u003ch2\u003eUltra-GREEN connections included\u003c\/h2\u003e\u003cp\u003eThe supplied Y-pipe is made from 304 stainless steel and uses the Ultra-GREEN catalyst specification. The headers have 1-3\/4\" primaries and 3\" collectors. It is a complete matched front arrangement for the listed 6.2-litre applications, with the rear outlet sized for the OEM connection.\u003c\/p\u003e\u003ch2\u003eTuning for your completed engine\u003c\/h2\u003e\u003cp\u003eA tune is not required for this particular kit as supplied. We still recommend calibration advice around the headers, engine and other modifications, so the finished setup works together.\u003c\/p\u003e\u003ch2\u003eTuning for your exhaust upgrade\u003c\/h2\u003e\u003cp\u003eA tune is not required for the specified installation, but we recommend tuning advice with every header upgrade. \u003ca href=\"https:\/\/hooniesadrenaline.co.uk\/pages\/contact\"\u003eContact us\u003c\/a\u003e about your headers, other modifications and fuel so we can help you plan the completed setup.\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\u003e2021-2023\u003c\/td\u003e\n\u003ctd\u003eCadillac Escalade\u003c\/td\u003e\n\u003ctd\u003e6.2L V8\u003c\/td\u003e\n\u003ctd\u003e2863H300\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2021-2023\u003c\/td\u003e\n\u003ctd\u003eChevrolet Suburban\u003c\/td\u003e\n\u003ctd\u003e6.2L V8\u003c\/td\u003e\n\u003ctd\u003e2863H300\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2019-2023\u003c\/td\u003e\n\u003ctd\u003eChevrolet Silverado 1500 High Country\u003c\/td\u003e\n\u003ctd\u003e6.2L V8\u003c\/td\u003e\n\u003ctd\u003e2863H300\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2019-2023\u003c\/td\u003e\n\u003ctd\u003eChevrolet Silverado 1500 LTZ\u003c\/td\u003e\n\u003ctd\u003e6.2L V8\u003c\/td\u003e\n\u003ctd\u003e2863H300\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2020-2023\u003c\/td\u003e\n\u003ctd\u003eChevrolet Silverado 1500 RST\u003c\/td\u003e\n\u003ctd\u003e6.2L V8\u003c\/td\u003e\n\u003ctd\u003e2863H300\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2020\u003c\/td\u003e\n\u003ctd\u003eChevrolet Silverado 1500 LT Trail Boss\u003c\/td\u003e\n\u003ctd\u003e6.2L V8\u003c\/td\u003e\n\u003ctd\u003e2863H300\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2022-2023\u003c\/td\u003e\n\u003ctd\u003eChevrolet Silverado 1500 ZR2\u003c\/td\u003e\n\u003ctd\u003e6.2L V8\u003c\/td\u003e\n\u003ctd\u003e2863H300\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2021-2023\u003c\/td\u003e\n\u003ctd\u003eGMC Yukon XL\u003c\/td\u003e\n\u003ctd\u003e6.2L V8\u003c\/td\u003e\n\u003ctd\u003e2863H300\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2019-2023\u003c\/td\u003e\n\u003ctd\u003eGMC Sierra 1500 SLT\u003c\/td\u003e\n\u003ctd\u003e6.2L V8\u003c\/td\u003e\n\u003ctd\u003e2863H300\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2019-2023\u003c\/td\u003e\n\u003ctd\u003eGMC Sierra 1500 AT4\u003c\/td\u003e\n\u003ctd\u003e6.2L V8\u003c\/td\u003e\n\u003ctd\u003e2863H300\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2019-2023\u003c\/td\u003e\n\u003ctd\u003eGMC Sierra 1500 Denali\u003c\/td\u003e\n\u003ctd\u003e6.2L V8\u003c\/td\u003e\n\u003ctd\u003e2863H300\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2021-2023\u003c\/td\u003e\n\u003ctd\u003eGMC Yukon\u003c\/td\u003e\n\u003ctd\u003e6.2L V8\u003c\/td\u003e\n\u003ctd\u003e2863H300\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\u003e2863H300\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eListed 2019-2023 GM 1500 6.2L applications\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\u003e1-3\/4\" primaries; 3\" collectors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eY-pipe\u003c\/td\u003e\n\u003ctd\u003e3\" Ultra-GREEN catted pipework\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear outlet\u003c\/td\u003e\n\u003ctd\u003e3-1\/2\" OEM interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitting parts\u003c\/td\u003e\n\u003ctd\u003eGaskets and bolt kit included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTuning\u003c\/td\u003e\n\u003ctd\u003eNot required for this supplied kit; we recommend a tune\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 I have to tune the vehicle to install this kit?\u003c\/h3\u003e\u003cp\u003eA tune is not required for 2863H300 as supplied. We recommend tuning with a header upgrade and can discuss calibration for your truck.\u003c\/p\u003e\u003ch3\u003eWhat is the header size?\u003c\/h3\u003e\u003cp\u003e1-3\/4\" primaries with 3\" collectors. This is a different configuration from the 1-7\/8\" GREEN kit.\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":"2026-10-08T10:41:02+01:00","handle":"kooks-2019-gm-1500-series-header-connection-kits-f00ccd4d","updated_at":"2026-10-11T04:31:22+01:00","published_at":"2026-10-09T13:43:40+01:00","template_suffix":null,"published_scope":"global","tags":"brand:kooks, cat:exhausts, dept:performance-parts, fits:cadillac-escalade, fits:chevrolet-silverado-1500, fits:chevrolet-suburban, fits:gmc-sierra-1500, fits:gmc-yukon, fits:gmc-yukon-xl, make:cadillac, make:chevrolet, make:gmc, type:header-kit","variants":[{"id":55646892818774,"product_id":11350206120278,"title":"6.2L \/ 1-3\/4\" \/ ULTRA GREEN Cats","price":"4676.34","sku":"2863H300","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"6.2L","option2":"1-3\/4\"","option3":"ULTRA GREEN Cats","created_at":"2026-10-08T10:41:02+01:00","updated_at":"2026-10-11T04:31:22+01:00","taxable":true,"barcode":"842422174514","grams":27669,"image_id":null,"weight":27.669,"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":14512387227990,"product_id":11350206120278,"name":"Engine Size","position":1,"values":["6.2L"]},{"id":14512387260758,"product_id":11350206120278,"name":"Header Size","position":2,"values":["1-3\/4\""]},{"id":14512387293526,"product_id":11350206120278,"name":"Cat Type","position":3,"values":["ULTRA GREEN Cats"]}],"images":[{"id":86449195614550,"product_id":11350206120278,"position":1,"created_at":"2026-10-08T10:41:02+01:00","updated_at":"2026-10-08T10:41:05+01:00","alt":"Kooks 1-3\/4\" Stainless Headers \u0026 Ultra-GREEN Catted Y-Pipe Kit 2019-2023 GM Truck 6.2L","width":3416,"height":2683,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/5e8d8a527404da993c9b14fca0e8fd49_83ebc7ac-cb58-4e19-ae4f-bc1f1f8b58dd.png?v=1791452465","variant_ids":[]},{"id":86449195647318,"product_id":11350206120278,"position":2,"created_at":"2026-10-08T10:41:02+01:00","updated_at":"2026-10-08T10:41:05+01:00","alt":"Kooks 1-3\/4\" Stainless Headers \u0026 Ultra-GREEN Catted Y-Pipe Kit 2019-2023 GM Truck 6.2L","width":5008,"height":3336,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/61be6f965719a5cbac8fc14b122c49fa_ef9b6fd6-1b54-4885-8da1-97cf8584844e.jpg?v=1791452465","variant_ids":[]},{"id":86449195680086,"product_id":11350206120278,"position":3,"created_at":"2026-10-08T10:41:02+01:00","updated_at":"2026-10-08T10:41:05+01:00","alt":"Kooks 1-3\/4\" Stainless Headers \u0026 Ultra-GREEN Catted Y-Pipe Kit 2019-2023 GM Truck 6.2L","width":1500,"height":1500,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/f005cc8598a9e5197e6da787fed92229_0a308735-763c-449e-a287-17849d26118b.jpg?v=1791452465","variant_ids":[]},{"id":86449195712854,"product_id":11350206120278,"position":4,"created_at":"2026-10-08T10:41:02+01:00","updated_at":"2026-10-08T10:41:05+01:00","alt":"Kooks 1-3\/4\" Stainless Headers \u0026 Ultra-GREEN Catted Y-Pipe Kit 2019-2023 GM Truck 6.2L","width":1500,"height":1500,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/f005cc8598a9e5197e6da787fed92229_2072c283-c801-4822-9589-2b40db3cf96f.jpg?v=1791452465","variant_ids":[]}],"image":{"id":86449195614550,"product_id":11350206120278,"position":1,"created_at":"2026-10-08T10:41:02+01:00","updated_at":"2026-10-08T10:41:05+01:00","alt":"Kooks 1-3\/4\" Stainless Headers \u0026 Ultra-GREEN Catted Y-Pipe Kit 2019-2023 GM Truck 6.2L","width":3416,"height":2683,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/5e8d8a527404da993c9b14fca0e8fd49_83ebc7ac-cb58-4e19-ae4f-bc1f1f8b58dd.png?v=1791452465","variant_ids":[]}}}