{"product":{"id":11350217785686,"title":"Kooks 1-7\/8 x 3-inch Weld-Up Header Kit | WK2400","body_html":"\u003ch2\u003eBuild your headers around the project\u003c\/h2\u003e\u003cp\u003eA custom installation gives you different space and clearance decisions from a standard car. Kooks WK2400 provides twelve 1-7\/8-inch 304 stainless J-bends and two 3-inch-outlet collectors so your fabricator can make headers to suit it.\u003c\/p\u003e\u003cp\u003eSKU: WK2400\u003c\/p\u003e\u003ch2\u003eMatched bends and collector sizes\u003c\/h2\u003e\u003cp\u003eThe kit includes twelve JB-188-25-16-304 bends and two 9905S collectors. It gives you 1-7\/8-inch primary tubing with a 3-inch outlet, useful dimensions to settle before the connecting exhaust is made. The two 9905S collectors have a four-into-one slip-on design with a scavenging spike, 1-7\/8-inch inside-diameter inlets and 3-inch outside-diameter outlets. The inlets slip over the matching primary tubes, ready for your fabricator to position them. The twelve JB-188-25-16-304 J-bends are 16-gauge, mandrel-bent 180-degree tubing with a 2.50-inch centreline radius.\u003c\/p\u003e\u003ch2\u003eChoose the head flanges separately\u003c\/h2\u003e\u003cp\u003eTwo flanges are required for your cylinder heads. Match the port and bolt pattern, then have the tubes positioned around the steering, suspension and starter before welding the headers.\u003c\/p\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\u003eWK2400\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eWeld-up custom header fabrication\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary tube diameter\u003c\/td\u003e\n\u003ctd\u003e1-7\/8-inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCollector outlet diameter\u003c\/td\u003e\n\u003ctd\u003e3-inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded bends\u003c\/td\u003e\n\u003ctd\u003eTwelve JB-188-25-16-304 J-bends\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded collectors\u003c\/td\u003e\n\u003ctd\u003eTwo 9905S collectors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeader flanges\u003c\/td\u003e\n\u003ctd\u003eTwo flanges required; purchased separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded collector design\u003c\/td\u003e\n\u003ctd\u003eTwo 9905S four-into-one slip-on collectors with scavenging spikes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCollector inlet \/ outlet\u003c\/td\u003e\n\u003ctd\u003e1-7\/8-inch inside-diameter inlet \/ 3-inch outside-diameter outlet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJ-bend construction\u003c\/td\u003e\n\u003ctd\u003eTwelve JB-188-25-16-304; 16-gauge, mandrel-bent 180-degree tubing; 2.50-inch centreline radius\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\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eAre the header flanges supplied?\u003c\/h3\u003e\u003cp\u003eTwo header flanges are required and purchased separately for your actual head pattern.\u003c\/p\u003e\u003ch3\u003eIs the collector outlet 3 inches?\u003c\/h3\u003e\u003cp\u003eYes. WK2400 includes two 9905S collectors with 3-inch outlets.\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":"Exhaust Fabrication Components","created_at":"2026-10-08T10:41:43+01:00","handle":"kooks-wk2400","updated_at":"2026-10-12T13:08:42+01:00","published_at":"2026-10-09T13:37:02+01:00","template_suffix":null,"published_scope":"global","tags":"brand:kooks, cat:exhausts, class:equipment-service-non-vehicle, dept:performance-parts, type:exhaust-fabrication-component","variants":[{"id":55646909563222,"product_id":11350217785686,"title":"Default Title","price":"901.91","sku":"WK2400","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"Default Title","option2":null,"option3":null,"created_at":"2026-10-08T10:41:43+01:00","updated_at":"2026-10-12T13:08:42+01:00","taxable":true,"barcode":"842422180164","grams":20412,"image_id":null,"weight":20.412,"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":14512401711446,"product_id":11350217785686,"name":"Title","position":1,"values":["Default Title"]}],"images":[{"id":86449302438230,"product_id":11350217785686,"position":1,"created_at":"2026-10-08T10:41:43+01:00","updated_at":"2026-10-08T10:41:46+01:00","alt":"Kooks 1-7\/8\" x 3\" 304 Stainless Steel Header Weld Up Custom Header Kit","width":1103,"height":762,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/d62fa362c3739229c3cd1da3ff199008_1a0d9c9d-a47f-4143-b81e-588470e0dd88.jpg?v=1791452506","variant_ids":[]}],"image":{"id":86449302438230,"product_id":11350217785686,"position":1,"created_at":"2026-10-08T10:41:43+01:00","updated_at":"2026-10-08T10:41:46+01:00","alt":"Kooks 1-7\/8\" x 3\" 304 Stainless Steel Header Weld Up Custom Header Kit","width":1103,"height":762,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/d62fa362c3739229c3cd1da3ff199008_1a0d9c9d-a47f-4143-b81e-588470e0dd88.jpg?v=1791452506","variant_ids":[]}}}