{"product":{"id":11350220538198,"title":"Kooks Jeep JK 4-Door LS-Swap Cat-Back (2007-2018) | 37104100","body_html":"\u003ch2\u003eGive your LS-powered Jeep its rear exhaust\u003c\/h2\u003e\u003cp\u003eComplete the exhaust on your LS-converted JK with a rear system made for the conversion. Kooks 37104100 uses 3-inch, 16-gauge mandrel-bent 304 stainless tubing and an oval muffler for the 2007-2018 Wrangler JK 4-door.\u003c\/p\u003e\u003cp\u003eSKU: 37104100\u003c\/p\u003e\u003ch2\u003eA matching rear section for the conversion\u003c\/h2\u003e\u003cp\u003eThe 3-inch oval muffler has a 4 x 9 x 14-inch body. Pair the cat-back with the Kooks LS-swap headers and Y-pipe, so the front, middle and rear of the exhaust belong to the same installation.\u003c\/p\u003e\u003ch2\u003eMake room for the LS installation\u003c\/h2\u003e\u003cp\u003eUse an RPM Extreme or comparable conversion kit, with a minimum 2-1\/2-inch lift recommended. Have the installer check driveline and chassis clearance as the full system is aligned.\u003c\/p\u003e\u003ch2\u003eMatching products\u003c\/h2\u003e\u003cp\u003eThe \u003ca href=\"https:\/\/hooniesadrenaline.co.uk\/products\/kooks-37103100?variant=55646914969942\"\u003eLS-swap Competition Y-pipe\u003c\/a\u003e joins this cat-back to the Kooks LS-swap headers on the 2007-2018 JK 4-door using the specified conversion kit and recommended lift.\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\u003e2018\u003c\/td\u003e\n\u003ctd\u003eJeep Wrangler JK Unlimited Sport\u003c\/td\u003e\n\u003ctd\u003eInstalled LS\u003c\/td\u003e\n\u003ctd\u003e37104100\u003c\/td\u003e\n\u003ctd\u003eLS conversion; specified conversion kit; matching Kooks headers \/ Y-pipe; minimum 2-1\/2-inch lift recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2018\u003c\/td\u003e\n\u003ctd\u003eJeep Wrangler JK Unlimited Sport S\u003c\/td\u003e\n\u003ctd\u003eInstalled LS\u003c\/td\u003e\n\u003ctd\u003e37104100\u003c\/td\u003e\n\u003ctd\u003eLS conversion; specified conversion kit; matching Kooks headers \/ Y-pipe; minimum 2-1\/2-inch lift recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2018\u003c\/td\u003e\n\u003ctd\u003eJeep Wrangler JK Unlimited Sahara\u003c\/td\u003e\n\u003ctd\u003eInstalled LS\u003c\/td\u003e\n\u003ctd\u003e37104100\u003c\/td\u003e\n\u003ctd\u003eLS conversion; specified conversion kit; matching Kooks headers \/ Y-pipe; minimum 2-1\/2-inch lift recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2018\u003c\/td\u003e\n\u003ctd\u003eJeep Wrangler JK Unlimited Rubicon\u003c\/td\u003e\n\u003ctd\u003eInstalled LS\u003c\/td\u003e\n\u003ctd\u003e37104100\u003c\/td\u003e\n\u003ctd\u003eLS conversion; specified conversion kit; matching Kooks headers \/ Y-pipe; minimum 2-1\/2-inch lift recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2018\u003c\/td\u003e\n\u003ctd\u003eJeep Wrangler JK Unlimited Willys Wheeler\u003c\/td\u003e\n\u003ctd\u003eInstalled LS\u003c\/td\u003e\n\u003ctd\u003e37104100\u003c\/td\u003e\n\u003ctd\u003eLS conversion; specified conversion kit; matching Kooks headers \/ Y-pipe; minimum 2-1\/2-inch lift recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2007-2017\u003c\/td\u003e\n\u003ctd\u003eJeep Wrangler Unlimited Sahara\u003c\/td\u003e\n\u003ctd\u003eInstalled LS\u003c\/td\u003e\n\u003ctd\u003e37104100\u003c\/td\u003e\n\u003ctd\u003eLS conversion; specified conversion kit; matching Kooks headers \/ Y-pipe; minimum 2-1\/2-inch lift recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2007-2017\u003c\/td\u003e\n\u003ctd\u003eJeep Wrangler Unlimited Rubicon\u003c\/td\u003e\n\u003ctd\u003eInstalled LS\u003c\/td\u003e\n\u003ctd\u003e37104100\u003c\/td\u003e\n\u003ctd\u003eLS conversion; specified conversion kit; matching Kooks headers \/ Y-pipe; minimum 2-1\/2-inch lift recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2007-2010\u003c\/td\u003e\n\u003ctd\u003eJeep Wrangler Unlimited X\u003c\/td\u003e\n\u003ctd\u003eInstalled LS\u003c\/td\u003e\n\u003ctd\u003e37104100\u003c\/td\u003e\n\u003ctd\u003eLS conversion; specified conversion kit; matching Kooks headers \/ Y-pipe; minimum 2-1\/2-inch lift recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2010-2017\u003c\/td\u003e\n\u003ctd\u003eJeep Wrangler Unlimited Sport\u003c\/td\u003e\n\u003ctd\u003eInstalled LS\u003c\/td\u003e\n\u003ctd\u003e37104100\u003c\/td\u003e\n\u003ctd\u003eLS conversion; specified conversion kit; matching Kooks headers \/ Y-pipe; minimum 2-1\/2-inch lift recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2010\u003c\/td\u003e\n\u003ctd\u003eJeep Wrangler Unlimited Mountain\u003c\/td\u003e\n\u003ctd\u003eInstalled LS\u003c\/td\u003e\n\u003ctd\u003e37104100\u003c\/td\u003e\n\u003ctd\u003eLS conversion; specified conversion kit; matching Kooks headers \/ Y-pipe; minimum 2-1\/2-inch lift recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2016\u003c\/td\u003e\n\u003ctd\u003eJeep Wrangler Unlimited Sport S\u003c\/td\u003e\n\u003ctd\u003eInstalled LS\u003c\/td\u003e\n\u003ctd\u003e37104100\u003c\/td\u003e\n\u003ctd\u003eLS conversion; specified conversion kit; matching Kooks headers \/ Y-pipe; minimum 2-1\/2-inch lift recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2016\u003c\/td\u003e\n\u003ctd\u003eJeep Wrangler Unlimited 75th Anniversary\u003c\/td\u003e\n\u003ctd\u003eInstalled LS\u003c\/td\u003e\n\u003ctd\u003e37104100\u003c\/td\u003e\n\u003ctd\u003eLS conversion; specified conversion kit; matching Kooks headers \/ Y-pipe; minimum 2-1\/2-inch lift recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2017\u003c\/td\u003e\n\u003ctd\u003eJeep Wrangler Unlimited Winter Edition\u003c\/td\u003e\n\u003ctd\u003eInstalled LS\u003c\/td\u003e\n\u003ctd\u003e37104100\u003c\/td\u003e\n\u003ctd\u003eLS conversion; specified conversion kit; matching Kooks headers \/ Y-pipe; minimum 2-1\/2-inch lift recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2017\u003c\/td\u003e\n\u003ctd\u003eJeep Wrangler Unlimited Smoky Mountain\u003c\/td\u003e\n\u003ctd\u003eInstalled LS\u003c\/td\u003e\n\u003ctd\u003e37104100\u003c\/td\u003e\n\u003ctd\u003eLS conversion; specified conversion kit; matching Kooks headers \/ Y-pipe; minimum 2-1\/2-inch lift recommended\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\u003e37104100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003e2007-2018 Jeep Wrangler JK 4-door with LS conversion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePipe diameter\u003c\/td\u003e\n\u003ctd\u003e3-inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003e16-gauge, mandrel-bent tubing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMuffler\u003c\/td\u003e\n\u003ctd\u003e3-inch oval muffler; 4 x 9 x 14-inch body\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRequired front parts\u003c\/td\u003e\n\u003ctd\u003eKooks LS-swap headers and Y-pipe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEngine conversion\u003c\/td\u003e\n\u003ctd\u003eRPM Extreme or comparable LS conversion kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended lift\u003c\/td\u003e\n\u003ctd\u003eMinimum 2-1\/2-inch lift\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\u003eWill this fit behind the standard Jeep engine exhaust?\u003c\/h3\u003e\u003cp\u003eIt is for the specified LS conversion, with Kooks LS-swap headers and Y-pipe.\u003c\/p\u003e\u003ch3\u003eIs this for the two-door JK?\u003c\/h3\u003e\u003cp\u003eThe offered application is the 2007-2018 JK 4-door. The conversion and recommended lift conditions apply.\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 Systems","created_at":"2026-10-08T10:41:56+01:00","handle":"kooks-37104100","updated_at":"2026-10-10T19:59:06+01:00","published_at":"2026-10-09T13:35:18+01:00","template_suffix":null,"published_scope":"global","tags":"brand:kooks, cat:exhausts, dept:performance-parts, fits:jeep-wrangler, fits:jeep-wrangler-jk, make:jeep, type:exhaust-system","variants":[{"id":55646916378966,"product_id":11350220538198,"title":"Default Title","price":"688.33","sku":"37104100","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"Default Title","option2":null,"option3":null,"created_at":"2026-10-08T10:41:56+01:00","updated_at":"2026-10-10T19:59:06+01:00","taxable":true,"barcode":"842422172350","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":14512404889942,"product_id":11350220538198,"name":"Title","position":1,"values":["Default Title"]}],"images":[{"id":86449329963350,"product_id":11350220538198,"position":1,"created_at":"2026-10-08T10:41:56+01:00","updated_at":"2026-10-08T10:41:59+01:00","alt":"Kooks 3\" SS Cat-Back for LS Swap. 2007-2018 Jeep Wrangler JK 4-Door.","width":1500,"height":1500,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/26c12dee5ad9682d7b70c04a748ce9e3_fac8795a-1b2c-4253-90cf-f2439069108c.jpg?v=1791452519","variant_ids":[]}],"image":{"id":86449329963350,"product_id":11350220538198,"position":1,"created_at":"2026-10-08T10:41:56+01:00","updated_at":"2026-10-08T10:41:59+01:00","alt":"Kooks 3\" SS Cat-Back for LS Swap. 2007-2018 Jeep Wrangler JK 4-Door.","width":1500,"height":1500,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/26c12dee5ad9682d7b70c04a748ce9e3_fac8795a-1b2c-4253-90cf-f2439069108c.jpg?v=1791452519","variant_ids":[]}}}