{"product_id":"kooks-wk2450","title":"Kooks 1-7\/8 x 3-1\/2-inch Weld-Up Header Kit | WK2450","description":"\u003ch2\u003eCustom headers with the collector size you need\u003c\/h2\u003e\u003cp\u003eKeep 1-7\/8-inch primary tubing and choose a 3-1\/2-inch collector outlet with Kooks WK2450. The 304 stainless weld-up kit lets your fabricator make the header shape around the engine and available space in your project.\u003c\/p\u003e\u003cp\u003eSKU: WK2450\u003c\/p\u003e\u003ch2\u003eTubes and collectors included\u003c\/h2\u003e\u003cp\u003eTwelve JB-188-25-16-304 J-bends and two 9906S collectors are supplied. Compared with the 3-inch-outlet kit, the main change is the collector outlet, so choose around the intended downstream exhaust. The two 9906S collectors have a four-into-one slip-on design with a scavenging spike, 1-7\/8-inch inside-diameter inlets and 3-1\/2-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\u003eComplete the kit with your head flanges\u003c\/h2\u003e\u003cp\u003eTwo header flanges are purchased separately. The exact cylinder-head port and bolt pattern should determine that choice, with final pipe routing established before welding.\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\u003eWK2450\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\u003e3-1\/2-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 9906S 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 9906S 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 \/ 3-1\/2-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\u003eWhat is the difference from WK2400?\u003c\/h3\u003e\u003cp\u003eWK2450 has 3-1\/2-inch-outlet collectors; WK2400 has 3-inch-outlet collectors. Both use 1-7\/8-inch J-bends.\u003c\/p\u003e\u003ch3\u003eHow many flanges do I need?\u003c\/h3\u003e\u003cp\u003eTwo cylinder-head flanges, purchased separately for the engine in your project.\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","brand":"Kooks","offers":[{"title":"Default Title","offer_id":55646909890902,"sku":"WK2450","price":901.91,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/d62fa362c3739229c3cd1da3ff199008_2be7a4c5-5c3a-4d77-aeaf-13a39b41fbc1.jpg?v=1791452506","url":"https:\/\/hooniesadrenaline.co.uk\/products\/kooks-wk2450","provider":"Hoonies Adrenaline","version":"1.0","type":"link"}