{"product":{"id":11350220308822,"title":"Kooks Jeep JK 4-Door LS-Swap Competition Y-Pipe (2007-2018) | 37103100","body_html":"\u003ch2\u003eBring your LS-powered Jeep exhaust together\u003c\/h2\u003e\u003cp\u003eAn LS conversion changes what your Jeep can be. This Kooks Y-pipe joins the matching LS-swap headers to the 37104100 cat-back, giving your 2007-2018 JK 4-door a purpose-made 3-inch exhaust connection.\u003c\/p\u003e\u003cp\u003eSKU: 37103100\u003c\/p\u003e\u003ch2\u003eMade around the LS conversion\u003c\/h2\u003e\u003cp\u003e37103100 uses 16-gauge, mandrel-bent 304 stainless steel with TORCA header connections. It matches Kooks 37102200 or 37102400 headers and the 37104100 rear exhaust, so you can buy the front and rear sections that belong together.\u003c\/p\u003e\u003ch2\u003eGive the driveline enough room\u003c\/h2\u003e\u003cp\u003eUse an RPM Extreme or comparable LS conversion kit. A minimum 2-1\/2-inch lift is recommended. Your installer should align the engine, driveline and exhaust together, with room around the starter, front driveshaft and wiring.\u003c\/p\u003e\u003ch2\u003eMatching products\u003c\/h2\u003e\u003cp\u003eFor a 2007-2018 JK 4-door using the specified LS conversion kit and engine mounts, the \u003ca href=\"https:\/\/hooniesadrenaline.co.uk\/products\/kooks-37102200?variant=55646914511190\"\u003e1-3\/4-inch LS-swap headers\u003c\/a\u003e provide the matching front header connection. This header route requires an RPM Extreme JKLS-HC-ENG-MOUNT plate or equivalent and GM Gen IV hydraulic engine mounts; a minimum 2-1\/2-inch suspension lift is recommended. Finish that same JK 4-door LS conversion with the \u003ca href=\"https:\/\/hooniesadrenaline.co.uk\/products\/kooks-37104100?variant=55646916378966\"\u003eLS-swap cat-back\u003c\/a\u003e; the headers, Y-pipe and rear section are separate purchases.\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 Sahara\u003c\/td\u003e\n\u003ctd\u003eInstalled LS\u003c\/td\u003e\n\u003ctd\u003e37103100\u003c\/td\u003e\n\u003ctd\u003eLS conversion; RPM Extreme or comparable kit; 37102200 \/ 37102400 headers and 37104100 cat-back; 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\u003e37103100\u003c\/td\u003e\n\u003ctd\u003eLS conversion; RPM Extreme or comparable kit; 37102200 \/ 37102400 headers and 37104100 cat-back; 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\u003e37103100\u003c\/td\u003e\n\u003ctd\u003eLS conversion; RPM Extreme or comparable kit; 37102200 \/ 37102400 headers and 37104100 cat-back; 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\u003e37103100\u003c\/td\u003e\n\u003ctd\u003eLS conversion; RPM Extreme or comparable kit; 37102200 \/ 37102400 headers and 37104100 cat-back; 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\u003c\/td\u003e\n\u003ctd\u003eInstalled LS\u003c\/td\u003e\n\u003ctd\u003e37103100\u003c\/td\u003e\n\u003ctd\u003eLS conversion; RPM Extreme or comparable kit; 37102200 \/ 37102400 headers and 37104100 cat-back; 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\u003e37103100\u003c\/td\u003e\n\u003ctd\u003eLS conversion; RPM Extreme or comparable kit; 37102200 \/ 37102400 headers and 37104100 cat-back; 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\u003e37103100\u003c\/td\u003e\n\u003ctd\u003eLS conversion; RPM Extreme or comparable kit; 37102200 \/ 37102400 headers and 37104100 cat-back; 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\u003e37103100\u003c\/td\u003e\n\u003ctd\u003eLS conversion; RPM Extreme or comparable kit; 37102200 \/ 37102400 headers and 37104100 cat-back; 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\u003e37103100\u003c\/td\u003e\n\u003ctd\u003eLS conversion; RPM Extreme or comparable kit; 37102200 \/ 37102400 headers and 37104100 cat-back; 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\u003e37103100\u003c\/td\u003e\n\u003ctd\u003eLS conversion; RPM Extreme or comparable kit; 37102200 \/ 37102400 headers and 37104100 cat-back; 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\u003e37103100\u003c\/td\u003e\n\u003ctd\u003eLS conversion; RPM Extreme or comparable kit; 37102200 \/ 37102400 headers and 37104100 cat-back; 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\u003e37103100\u003c\/td\u003e\n\u003ctd\u003eLS conversion; RPM Extreme or comparable kit; 37102200 \/ 37102400 headers and 37104100 cat-back; 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\u003e37103100\u003c\/td\u003e\n\u003ctd\u003eLS conversion; RPM Extreme or comparable kit; 37102200 \/ 37102400 headers and 37104100 cat-back; 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\u003e37103100\u003c\/td\u003e\n\u003ctd\u003eLS conversion; RPM Extreme or comparable kit; 37102200 \/ 37102400 headers and 37104100 cat-back; 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\u003e37103100\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\u003eHeader connection\u003c\/td\u003e\n\u003ctd\u003eTORCA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRequired headers\u003c\/td\u003e\n\u003ctd\u003e37102200 or 37102400\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRequired rear exhaust\u003c\/td\u003e\n\u003ctd\u003e37104100 cat-back\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\u003eCatalysts\u003c\/td\u003e\n\u003ctd\u003eUncatted Competition version\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\u003eWhich headers and rear exhaust does it need?\u003c\/h3\u003e\u003cp\u003eUse 37102200 or 37102400 Kooks LS-swap headers and the 37104100 cat-back. These parts are purchased separately.\u003c\/p\u003e\u003ch3\u003eDoes it include catalytic converters?\u003c\/h3\u003e\u003cp\u003eNo. 37103100 is the uncatted Competition Y-pipe.\u003c\/p\u003e\u003ch2\u003eIntended use\u003c\/h2\u003e\u003cp\u003e37103100: Competition, off-road and track use only. Not for use on public roads.\u003c\/p\u003e\u003cp\u003eThe competition-use waiver applies to 37103100.\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 Pipes","created_at":"2026-10-08T10:41:54+01:00","handle":"kooks-37103100","updated_at":"2026-10-10T19:58:56+01:00","published_at":"2026-10-09T13:35:28+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-pipe","variants":[{"id":55646914969942,"product_id":11350220308822,"title":"Default Title","price":"1512.12","sku":"37103100","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"Default Title","option2":null,"option3":null,"created_at":"2026-10-08T10:41:54+01:00","updated_at":"2026-10-10T19:58:56+01:00","taxable":true,"barcode":"842422171643","grams":11340,"image_id":null,"weight":11.34,"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":14512404660566,"product_id":11350220308822,"name":"Title","position":1,"values":["Default Title"]}],"images":[{"id":86449329307990,"product_id":11350220308822,"position":1,"created_at":"2026-10-08T10:41:54+01:00","updated_at":"2026-10-08T10:41:57+01:00","alt":"Kooks 3\" SS Competition Only Y-Pipe 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\/af942a9a780fdc253908659942dba9e7.jpg?v=1791452517","variant_ids":[]}],"image":{"id":86449329307990,"product_id":11350220308822,"position":1,"created_at":"2026-10-08T10:41:54+01:00","updated_at":"2026-10-08T10:41:57+01:00","alt":"Kooks 3\" SS Competition Only Y-Pipe 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\/af942a9a780fdc253908659942dba9e7.jpg?v=1791452517","variant_ids":[]}}}