{"product":{"id":11350202548566,"title":"Kooks 2\" to 4\" Stamped Merge Collector - 9909SM","body_html":"\u003ch2\u003eBring your custom header primaries into one collector\u003c\/h2\u003e\u003cp\u003eThe Kooks 9909SM stamped merge collector joins four 2\" primary tubes into a single outlet for a custom header build. Its 304 stainless construction and scavenging-spike design give your fabricator a defined collector specification, with the inlet, merge and outlet measurements kept separate.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e 9909SM\u003c\/p\u003e\u003ch2\u003eThree sizes with three different jobs\u003c\/h2\u003e\u003cp\u003eThe four inlets have a 2\" inside diameter to slip over 2\" primaries. The merge section is 3-1\/2\", leading into a 4\" outside-diameter outlet. Use the inlet for primary fit and the outlet for the next exhaust connection; they are not interchangeable dimensions.\u003c\/p\u003e\u003ch2\u003eFor a fabricated header\u003c\/h2\u003e\u003cp\u003eTwo A\/B attachment tabs are included. This is one collector for a fabricated assembly, not a vehicle-specific bolt-on header. Plan the primary layout, support and joining work with the fabricator.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\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\u003e9909SM\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\u003eDesign\u003c\/td\u003e\n\u003ctd\u003eStamped 4-into-1 slip merge collector with scavenging spike\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary inlets\u003c\/td\u003e\n\u003ctd\u003eFour 2\" inside-diameter (ID) inlets\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMerge diameter\u003c\/td\u003e\n\u003ctd\u003e3-1\/2\" merge section\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutlet\u003c\/td\u003e\n\u003ctd\u003e4\" outside diameter (OD)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded parts\u003c\/td\u003e\n\u003ctd\u003eCollector and two A\/B attachment tabs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003eOne collector; sold individually\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eFAQs\u003c\/h2\u003e\u003ch3\u003eWill the inlets fit over 2\" primaries?\u003c\/h3\u003e\u003cp\u003eThey have a 2\" inside diameter for that slip connection.\u003c\/p\u003e\u003ch3\u003eIs the outlet 4\" inside diameter?\u003c\/h3\u003e\u003cp\u003eNo. The outlet is 4\" outside diameter.\u003c\/p\u003e\u003ch3\u003eAre attachment tabs supplied?\u003c\/h3\u003e\u003cp\u003eYes. Two A\/B tabs are included with the collector.\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":"2026-10-08T10:40:47+01:00","handle":"kooks-9909sm","updated_at":"2026-10-11T10:14:48+01:00","published_at":"2026-10-09T13:07:50+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":55646887805270,"product_id":11350202548566,"title":"Default Title","price":"296.20","sku":"9909SM","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"Default Title","option2":null,"option3":null,"created_at":"2026-10-08T10:40:47+01:00","updated_at":"2026-10-11T10:14:48+01:00","taxable":true,"barcode":"842422142438","grams":4536,"image_id":null,"weight":4.536,"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":14512382542166,"product_id":11350202548566,"name":"Title","position":1,"values":["Default Title"]}],"images":[{"id":86449169170774,"product_id":11350202548566,"position":1,"created_at":"2026-10-08T10:40:47+01:00","updated_at":"2026-10-08T10:40:49+01:00","alt":"Kooks 2\" x 4\" 304 Stainless Steel Stamped Merge Slip-On Collector","width":1500,"height":1500,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/91f02c5392f8be9e597bd1569f967a1b_049b9108-e66e-4486-a6f1-4d876f8df538.jpg?v=1791452449","variant_ids":[]}],"image":{"id":86449169170774,"product_id":11350202548566,"position":1,"created_at":"2026-10-08T10:40:47+01:00","updated_at":"2026-10-08T10:40:49+01:00","alt":"Kooks 2\" x 4\" 304 Stainless Steel Stamped Merge Slip-On Collector","width":1500,"height":1500,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/91f02c5392f8be9e597bd1569f967a1b_049b9108-e66e-4486-a6f1-4d876f8df538.jpg?v=1791452449","variant_ids":[]}}}