{"product":{"id":11350219260246,"title":"Kooks RAM TRX 6.2 HEMI Header and Connection Kits","body_html":"\u003ch2\u003eGive your TRX a front exhaust to match your ambitions\u003c\/h2\u003e\u003cp\u003eYour TRX already has a supercharged V8 worth enjoying. These Kooks kits upgrade its headers and front connections together, with a choice of 1-7\/8\" or 2\" primaries and H.O. GREEN catalytic connections. The rear pipes use the OEM two-bolt flanges, so the factory cat-back can stay.\u003c\/p\u003e\u003cp\u003eSKUs: 3521H410, 3521H440, 3521H640\u003c\/p\u003e\u003ch2\u003eChoose the header and catalyst combination\u003c\/h2\u003e\u003cp\u003eThe 1-7\/8\" kit is available with Competition Only pipes or H.O. GREEN cats. The 2\" kit uses H.O. GREEN cats. The catted versions have 4-1\/2\" catalyst bodies and a 300-cell substrate, giving you a high-output catalyst specification suited to the supercharged engine.\u003c\/p\u003e\u003ch2\u003eMatched parts and a familiar rear interface\u003c\/h2\u003e\u003cp\u003eMandrel-bent 304 stainless steel tubing, 3\/8\" header flanges and the supplied gaskets and hardware make this a substantial paired upgrade. The OEM two-bolt rear interface lets you retain the factory cat-back or a compatible replacement that uses the same connection.\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\u003e3521H410\u003c\/td\u003e\n\u003ctd\u003eHeader Size: 1-7\/8\"; Cat Type: Comp. Only\u003c\/td\u003e\n\u003ctd\u003e1-7\/8\" headers; Competition Only front connections\u003c\/td\u003e\n\u003ctd\u003eUncatted; competition use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3521H440\u003c\/td\u003e\n\u003ctd\u003eHeader Size: 1-7\/8\"; Cat Type: H.O. GREEN Cats\u003c\/td\u003e\n\u003ctd\u003e1-7\/8\" headers; H.O. GREEN cats front connections\u003c\/td\u003e\n\u003ctd\u003eUse the SKU-specific vehicle rows below\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3521H640\u003c\/td\u003e\n\u003ctd\u003eHeader Size: 2\"; Cat Type: H.O. GREEN Cats\u003c\/td\u003e\n\u003ctd\u003e2\" headers; H.O. GREEN cats front connections\u003c\/td\u003e\n\u003ctd\u003eUse the SKU-specific vehicle rows below\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. \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\u003e2021-2023\u003c\/td\u003e\n\u003ctd\u003eRam 1500 TRX\u003c\/td\u003e\n\u003ctd\u003e6.2L V8\u003c\/td\u003e\n\u003ctd\u003e3521H410, 3521H440, 3521H640\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\u003eSKUs\u003c\/td\u003e\n\u003ctd\u003e3521H410, 3521H440, 3521H640\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eRAM 1500 TRX 6.2L supercharged HEMI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e304 stainless steel; mandrel-bent tubing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeader choices\u003c\/td\u003e\n\u003ctd\u003e1-7\/8\" or 2\" primaries; 3\" collectors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlanges\u003c\/td\u003e\n\u003ctd\u003e3\/8\" thick\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eH.O. GREEN cats\u003c\/td\u003e\n\u003ctd\u003e4-1\/2\" bodies; 300-cell substrate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear connection\u003c\/td\u003e\n\u003ctd\u003eOEM two-bolt flanges\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003ctd\u003eHeaders, selected front pipes, gaskets and installation hardware\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 the kits include front connection pipes?\u003c\/h3\u003e\u003cp\u003eYes. Choose the Competition Only or H.O. GREEN configuration against the SKU.\u003c\/p\u003e\u003ch3\u003eWhich 2-inch kit is on this page?\u003c\/h3\u003e\u003cp\u003e3521H640 pairs 2\" headers with H.O. GREEN catted connections. The 1-7\/8\" H.O. GREEN kit is 3521H440.\u003c\/p\u003e\u003ch2\u003eIntended use\u003c\/h2\u003e\u003cp\u003e3521H410: Competition, off-road and track use only. Not for use on public roads.\u003c\/p\u003e\u003cp\u003eThe competition-use waiver applies to 3521H410.\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":"2026-10-08T10:41:49+01:00","handle":"kooks-2021-ram-1500-trx-6-2l-header-conn-kits","updated_at":"2026-10-10T18:29:40+01:00","published_at":"2026-10-09T13:36:09+01:00","template_suffix":null,"published_scope":"global","tags":"brand:kooks, cat:exhausts, dept:performance-parts, fits:ram-1500, make:ram, type:header-kit","variants":[{"id":55646912348502,"product_id":11350219260246,"title":"1-7\/8\" \/ Comp. Only","price":"2798.80","sku":"3521H410","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"1-7\/8\"","option2":"Comp. Only","option3":null,"created_at":"2026-10-08T10:41:49+01:00","updated_at":"2026-10-10T18:29:40+01:00","taxable":true,"barcode":"842422180720","grams":39009,"image_id":null,"weight":39.009,"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":55646912381270,"product_id":11350219260246,"title":"1-7\/8\" \/ H.O. GREEN Cats","price":"4171.43","sku":"3521H440","position":2,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"1-7\/8\"","option2":"H.O. GREEN Cats","option3":null,"created_at":"2026-10-08T10:41:49+01:00","updated_at":"2026-10-10T18:29:40+01:00","taxable":true,"barcode":"842422180737","grams":39009,"image_id":null,"weight":39.009,"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":55646912414038,"product_id":11350219260246,"title":"2\" \/ H.O. GREEN Cats","price":"4282.97","sku":"3521H640","position":3,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"2\"","option2":"H.O. GREEN Cats","option3":null,"created_at":"2026-10-08T10:41:49+01:00","updated_at":"2026-10-10T18:29:40+01:00","taxable":true,"barcode":"842422180751","grams":39009,"image_id":null,"weight":39.009,"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":14512403448150,"product_id":11350219260246,"name":"Header Size","position":1,"values":["1-7\/8\"","2\""]},{"id":14512403480918,"product_id":11350219260246,"name":"Cat Type","position":2,"values":["Comp. Only","H.O. GREEN Cats"]}],"images":[{"id":86449316626774,"product_id":11350219260246,"position":1,"created_at":"2026-10-08T10:41:49+01:00","updated_at":"2026-10-08T10:41:52+01:00","alt":"Kooks 2021+ RAM 1500 TRX 6.2L Header\/Connection Kits","width":2300,"height":1701,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/a6de2994656f2941277439554dd8efc6_44a6ecf9-d15d-4bcb-9cd7-b5bfc6cafd3d.jpg?v=1791452512","variant_ids":[]},{"id":86449316659542,"product_id":11350219260246,"position":2,"created_at":"2026-10-08T10:41:49+01:00","updated_at":"2026-10-08T10:41:53+01:00","alt":"Kooks 2021+ RAM 1500 TRX 6.2L Header\/Connection Kits","width":2300,"height":1701,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/2992fb639614c2b7abcd11f501b3b7c3_b6587190-5c12-4efe-b389-c4af2fa4321c.jpg?v=1791452513","variant_ids":[]},{"id":86449316692310,"product_id":11350219260246,"position":3,"created_at":"2026-10-08T10:41:49+01:00","updated_at":"2026-10-08T10:41:53+01:00","alt":"Kooks 2021+ RAM 1500 TRX 6.2L Header\/Connection Kits","width":2300,"height":1701,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/2992fb639614c2b7abcd11f501b3b7c3_881e3b69-a699-4eac-9068-eaf34c8827f0.jpg?v=1791452513","variant_ids":[]}],"image":{"id":86449316626774,"product_id":11350219260246,"position":1,"created_at":"2026-10-08T10:41:49+01:00","updated_at":"2026-10-08T10:41:52+01:00","alt":"Kooks 2021+ RAM 1500 TRX 6.2L Header\/Connection Kits","width":2300,"height":1701,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/a6de2994656f2941277439554dd8efc6_44a6ecf9-d15d-4bcb-9cd7-b5bfc6cafd3d.jpg?v=1791452512","variant_ids":[]}}}