{"title":"Shelby GT500 Headers and Exhaust","description":"\u003ch1\u003eshelby-gt500-headers-and-exhaust\u003c\/h1\u003e","products":[{"product_id":"kooks-05-09-ford-mustang-gt-4-6l-3v-07-09-shelby-gt-500-full-3in-cat-back-exhaust","title":"Kooks 3\" SS Exhaust w\/SS tips. 2005-2009 Mustang GT\/GT500 (Requires Kooks X-Pipe) - 11304300","description":"Kooks 11304300 2005-2009 FORD MUSTANG GT\/SHELBY GT500 FULL 3\" CAT-BACK EXHAUST\u003cbr\u003e\u003cstrong\u003eDESCRIPTION\u003c\/strong\u003e\u003cbr\u003e2005-2009 Ford Mustang GT 4.6L\/GT500 5.4L Exhaust System\u003cbr\u003eFull 3\" Stainless Steel Exhaust System with Kooks Polished Race Mufflers and 4\" Slash Cut Polished Tips.\u003cbr\u003eFor Use With Kooks Headers and 3\" x 3\" X-Pipe or H-Pipe\u003cbr\u003eThese products are NOT legal for sale, installation, or use on a licensed vehicle in the state of California, and they do NOT meet CARB compliance\u003cbr\u003e","brand":"Kooks","offers":[{"title":"Default Title","offer_id":47080696807682,"sku":"KSH11304300","price":1542.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0618\/0354\/files\/a5f590ab5eb1c2141bc58b3db048d4fa_1.jpg?v=1784944481"},{"product_id":"kooks-2020-mustang-gt500-5-2l-2in-x-3in-ss-headers-w-green-catted-connection-pipe","title":"Kooks 2\" x 3\" Headers \u0026 GREEN Catted Connection Kit (2020+ Shelby GT500 5.2L) - 1156H630","description":"\u003cp\u003e\u003cspan\u003e2020+ Shelby GT500 5.2L 2\" x 3\" Stainless Steel Headers w\/GREEN Catted Connections and OEM adapters. 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Includes Mufflers and 4\" Polished Slash Cut Double Walled Tips.\u003c\/p\u003e","brand":"Kooks","offers":[{"title":"Default Title","offer_id":47947120378114,"sku":"KSH11406600","price":1083.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0618\/0354\/files\/ccecf38bcb3b52442b4e52fdea9f1366.jpg?v=1784979969"},{"product_id":"kooks-11-14-ford-shelby-gt500-5-4l-5-8l-4v-3in-x-2-3-4in-oem-green-cat-ss-x-pipe-kooks-hdr-req","title":"Kooks 3\" x 2-3\/4\"(OEM) SS GREEN Catted X-Pipe. 2011-2014 Shelby GT500. - 11423300","description":"\u003cp\u003eKooks Shelby GT500 3\" High Flow Catted X Pipe bolts to all cat-backs that use factory 2-3\/4\" diameter tubing at the factory connection point. The Kooks \"GREEN\" Catted X Pipe feature Kooks high quality, high flow catalytic converters that can tame even the most aggressive cat-back without impeding exhaust flow and will not trip your Check Engine Light (CEL) when used with the factory tune..\u003c\/p\u003e","brand":"Kooks","offers":[{"title":"Default Title","offer_id":47947121131778,"sku":"KSH11423300","price":2003.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0618\/0354\/files\/307d01785f15ed29b346c8046250762a_5.jpg?v=1784979976"},{"product_id":"kooks-11-14-ford-shelby-gt500-5-4l-5-8l-4v-3in-x-2-3-4in-oem-green-cat-ss-h-pipe-kooks-hdr-req","title":"Kooks 3\" x 2-3\/4\"(OEM) SS GREEN Catted H-Pipe. 2011-2014 Shelby GT500. - 11423600","description":"Kooks Shelby GT500 3\" High Flow Catted H Pipe bolts to all cat-backs that use factory 2-3\/4\" diameter tubing at the factory connection point. The Kooks \"GREEN\" Catted H Pipe feature Kooks high quality, high flow catalytic converters that can tame even the most aggressive cat-back without impeding exhaust flow and will not trip the Check Engine Light (CEL) when running the factory tune. \u003cbr\u003e\u003cbr\u003e\u003cstrong\u003e NOTE: MUST BE USED WITH KOOKS HEADERS\u003c\/strong\u003e","brand":"Kooks","offers":[{"title":"Default Title","offer_id":47947121197314,"sku":"KSH11423600","price":2109.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0618\/0354\/files\/ffe14b5c74f3fe22834eab3306ed5079_4.jpg?v=1784979977"},{"product_id":"kooks-11-14-ford-mustang-shelby-gt500-1-3-4-x-3-header-green-catted-x-pipe-kit","title":"Kooks 1-3\/4\" Header and GREEN (X) Connection Kit. 2011-2014 Shelby GT500 5.4L\/5.8L 4V - 1142H230","description":"Kooks 1-3\/4\" Header and GREEN (X) Connection Kit. 2011-2014 Shelby GT500 5.4L\/5.8L 4V - 1142H230\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eFitment\u003c\/b\u003e - 2011-2012 Ford Mustang Shelby GT500 5.4L V8, 2013-2014 Ford Mustang Shelby GT500 5.8L V8\u003cbr\u003e","brand":"Kooks","offers":[{"title":"Default Title","offer_id":47947121295618,"sku":"KSH1142H230","price":3721.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0618\/0354\/files\/86b106cf04c557b46b128d949ff17437_3.jpg?v=1784979975"},{"product_id":"kooks-11-14-ford-mustang-shelby-gt500-1-3-4-x-3-header-green-catted-h-pipe-kit","title":"Kooks 1-3\/4\" Header and GREEN (H) Connection Kit. 2011-2014 Shelby GT500 5.4L\/5.8L 4V - 1142H260","description":"Kooks 1-3\/4\" Header and GREEN (H) Connection Kit. 2011-2014 Shelby GT500 5.4L\/5.8L 4V - 1142H260\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eFitment\u003c\/b\u003e - 2011-2012 Ford Mustang Shelby GT500 5.4L V8, 2013-2014 Ford Mustang Shelby GT500 5.8L V8\u003cbr\u003e","brand":"Kooks","offers":[{"title":"Default Title","offer_id":47947121361154,"sku":"KSH1142H260","price":3827.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0618\/0354\/files\/86b106cf04c557b46b128d949ff17437_4.jpg?v=1784979977"},{"product_id":"kooks-11-14-ford-mustang-shelby-gt500-1-7-8-x-3-header-green-catted-x-pipe-kit","title":"Kooks 1-7\/8\" Header and GREEN (X) Connection Kit. 2011-2014 Shelby GT500 5.4L\/5.8L 4V - 1142H430","description":"Kooks 1-7\/8\" Header and GREEN (X) Connection Kit. 2011-2014 Shelby GT500 5.4L\/5.8L 4V - 1142H430\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eFitment\u003c\/b\u003e - 2011-2012 Ford Mustang Shelby GT500 5.4L V8, 2013-2014 Ford Mustang Shelby GT500 5.8L V8\u003cbr\u003e","brand":"Kooks","offers":[{"title":"Default Title","offer_id":47947121426690,"sku":"KSH1142H430","price":3884.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0618\/0354\/files\/3d39074d07b67806a03af00015fb719a_3.jpg?v=1784979979"},{"product_id":"kooks-13-14-ford-mustang-gt500-5-8l-4v-2-3-4in-x-3in-oem-cat-back-exhaust","title":"Kooks 3\" Cat-Back w\/SS Quad Tips.  2013-2014 Shebly GT500. - 11434200","description":"Stainless Steel Cat-Back Exhaust System with Quad Rear Exit (11434200) by Kooks®. Exhaust System Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Main Tubing Diameter: 3\". Exhaust System Sound: Aggressive \/ Loud. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind, this product by Kooks will last a lifetime. It will meet your needs and deliver great quality at an affordable cost.\n\u003cbr\u003e\u003cbr\u003e\nNotes: For Use With Kooks Complete Header And X-Pipe System Or With Factory OEM Exhaust System.\u003cbr\u003e\u003cbr\u003e\n\n\n\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003e\nExhaust System Type: Cat-Back\u003cbr\u003e\nExhaust Tubing Material: Stainless Steel\u003cbr\u003e\nMain Tubing Diameter: 3\"\u003cbr\u003e\nExhaust System Sound: Aggressive \/ Loud\u003cbr\u003e\nTip Quantity: 4\u003cbr\u003e\nTip Finish: Polished\u003cbr\u003e\nTip Outlet Diameter: 4\"\u003cbr\u003e\u003cbr\u003e\n\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003cbr\u003e\nIncludes Tips And Kooks Oval Race Mufflers\u003cbr\u003e\nExpertly crafted from premium materials\u003cbr\u003e\nDesigned to match rigorous quality standards\u003cbr\u003e\nHigh quality at a budget-friendly price\u003cbr\u003e\u003cbr\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e\u003cbr\u003e\nKooks Oval Race Mufflers\u003cbr\u003e\nTips\u003cbr\u003e\nOver-Axle Pipes\u003cbr\u003e\u003cbr\u003e\nKooks is here with excellent products that are available at a competitive price. The company does its utmost to provide the best possible solutions for your needs. All products by Kooks are made with expert care and created by professionals to meet all your requirements. Kooks does not accept compromises when it is going about quality, so you can be sure that all products have only first-rate quality. With many years of manufacturing experience, Kooks is the name you can trust.\n\u003cbr\u003e\u003cbr\u003e\nThe history of Kooks® dates back to 1962 when George Kook (Papa Kook) used his gas torch to build his first set of headers for his family race car. Involved heavily in racing his talents did not go unnoticed by all the local racers. Papa Kook competed week in and week out at area drag strips. The business of building high quality race headers and exhaust systems continues till this day. For the past 50 years Kooks has concentrated its efforts in the racing world. From drag to circle track, road racing, motorcycle, and even offshore boats, Kooks Headers has helped set records and win races. Some of the biggest and most dominant names in NHRA, IHRA, NMCA, NMRA, NASCAR, SCCA, and NASA continue to run Kooks headers and win championships. Kooks humble beginnings has now grown to a full fledge manufacturing facility with the help of George Kook Jr. High quality and great customer service remains the number one priority that helps to set us apart from the rest. You can expect that before and after your purchase as well as when you cross the finish line.","brand":"Kooks","offers":[{"title":"Default Title","offer_id":47947121557762,"sku":"KSH11434200","price":2381.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0618\/0354\/files\/4f8a1e1635289c4f16e006366a9d0952_1.jpg?v=1784979975"},{"product_id":"kooks-13-14-ford-mustang-gt500-5-8l-4v-2-3-4in-x-3in-oem-axleback-exhaust","title":"Kooks 3\" Axle-Back w\/SS Quad Tips.  2013-2014 Shebly GT500. - 11436200","description":"\u003cp\u003eStainless Steel Axle-Back Exhaust System with Quad Rear Exit (11436210) by Kooks. Direct OEM Replacement. Exhaust System Type: Axle-Back. Exhaust Tubing Material: Stainless Steel. Main Tubing Diameter: 2.75\" to 3\". Exhaust System Sound: Moderate. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind, this product by Kooks will last a lifetime. It will meet your needs and deliver great quality at an affordable cost.\u003cbr\u003e\n\u003cbr\u003e\n\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003e\nExhaust System Type: Axle-Back\u003cbr\u003e\nExhaust Tubing Material: Stainless Steel\u003cbr\u003e\nMain Tubing Diameter: 2.75\" to 3\"\u003cbr\u003e\nExhaust System Sound: Moderate\u003cbr\u003e\nTip Quantity: 4\u003cbr\u003e\nTip Finish: Polished\u003cbr\u003e\nTip Outlet Diameter: 4\"\u003cbr\u003e\nWeight: 40 lbs\u003cbr\u003e\n\u003cbr\u003e\n\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003cbr\u003e\nExpertly crafted from premium materials\u003cbr\u003e\nDesigned to match rigorous quality standards\u003cbr\u003e\nHigh quality at a budget-friendly price\u003cbr\u003e\n\u003cbr\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e\u003cbr\u003e\nTips\u003cbr\u003e\nKooks Oval Race Mufflers\u003cbr\u003e\n\u003cbr\u003e\nKooks is here with excellent products that are available at a competitive price. The company does its utmost to provide the best possible solutions for your needs. All products by Kooks are made with expert care and created by professionals to meet all your requirements. Kooks does not accept compromises when it is going about quality, so you can be sure that all products have only first-rate quality. With many years of manufacturing experience, Kooks is the name you can trust.\u003cbr\u003e\n\u003cbr\u003e\nThe history of Kooks® dates back to 1962 when George Kook (Papa Kook) used his gas torch to build his first set of headers for his family race car. Involved heavily in racing his talents did not go unnoticed by all the local racers. Papa Kook competed week in and week out at area drag strips. The business of building high quality race headers and exhaust systems continues till this day. For the past 50 years Kooks has concentrated its efforts in the racing world. From drag to circle track, road racing, motorcycle, and even offshore boats, Kooks Headers has helped set records and win races. Some of the biggest and most dominant names in NHRA, IHRA, NMCA, NMRA, NASCAR, SCCA, and NASA continue to run Kooks headers and win championships. Kooks humble beginnings has now grown to a full fledge manufacturing facility with the help of George Kook Jr. High quality and great customer service remains the number one priority that helps to set us apart from the rest. You can expect that before and after your purchase as well as when you cross the finish line.\u003c\/p\u003e","brand":"Kooks","offers":[{"title":"Default Title","offer_id":47947121688834,"sku":"KSH11436200","price":1904.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0618\/0354\/files\/b272baa566652a18af6fb1dfe5a70e50_1.jpg?v=1784979980"},{"product_id":"kooks-15-20-ford-mustang-gt-5-0l-3in-ss-green-catted-connection-pipes","title":"Kooks 3\" SS Green Catted Connection Pipes (2015-2026 Mustang GT 5.0L \/ 2020-2022 Shelby GT500) - 11513400","description":"\u003cp\u003e\u003cstrong\u003e2015-2022 Ford Mustang GT 5.0L 4V. 3\" Stainless Steel High Output GREEN Catted Front Connection pipes.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e3\" 16GA 304 Stainless Steel construction\u003c\/p\u003e\n\u003cp\u003eBall and socket style connection to Headers\u003c\/p\u003e\n\u003cp\u003eKooks High Output GREEN Cats feature a 4-1\/2\" 300 Cell High Flow Substrate\u003c\/p\u003e\n\u003cp\u003eDoes not Include Clamps\u003c\/p\u003e\n\u003cp\u003eRequires Kooks Headers and OEM Adapters or KOOKS Connection-Back Exhaust\u003c\/p\u003e\n\u003cp\u003eDOES NOT CONNECT TO OEM EXHAUST\u003c\/p\u003e\n\u003cp\u003eKOOKS GREEN Cats are suitable for use with forced induction\u003c\/p\u003e\n\u003cp\u003eKooks Headers and Exhaust has been the leader in the High Performance Exhaust Industry for over 50 Years! Since 1962, Kooks takes pride in offering the best Headers and complete exhaust systems for your street, race and off-road applications. We have won hundreds of championships and set countless records in the NHRA, IHRA, NMCA, NMRA, NASCAR, NASA, SCCA and many other racing organizations. Now with three generations of family leadership, we are proud to say that all of our products are handcrafted here in the USA and we are proud to still be independently owned and operated. And don't forget, \"Get Kookin with KOOKS!\"\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eManufactured In The USA. Kooks Uses T304 Aircraft Quality Stainless Steel. Kooks Products are Backed by a Limited Lifetime Warranty To the Original Purchaser. Kooks Products Are Dyno And Race Tested and Designed For Maximum Power.\u003c\/p\u003e","brand":"Kooks","offers":[{"title":"Default Title","offer_id":47947121918210,"sku":"KSH11513400","price":2149.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0618\/0354\/files\/44d205fe1be2b565c47c09f3509b4eda_2.jpg?v=1784979979"},{"product_id":"kooks-ford-5-4l-5-8l-4v-2in-ford-5-4l-5-8l-5-16in-thick-ss-flange","title":"Kooks Ford 5.4L\/ 5.8L 4V 2in Ford 5.4L\/ 5.8L 5\/16in Thick SS Flange","description":"\u003cp\u003eKooks Headers and Exhaust has been the leader in the High Performance Exhaust Industry for over 50 Years!  Since 1962, Kooks takes pride in offering the best Headers and complete exhaust systems for your street, race and off-road applications.  We have won hundreds of championships and set countless records in the NHRA, IHRA, NMCA, NMRA, NASCAR, NASA, SCCA and many other racing organizations.  Now with three generations of family leadership, we are proud to say that all of our products are handcrafted here in the USA and we are proud to still be independently owned and operated.  And don't forget, \"Get Kookin with KOOKS!\"\u003c\/p\u003e\u003ca href=\"https:\/\/d32vzsop7y1h3k.cloudfront.net\/2ead134d621d3f938a21c29c4c1ac6dd.PDF\"\u003eWarranty\u003c\/a\u003e\u003cbr\u003e","brand":"Kooks","offers":[{"title":"Default Title","offer_id":47947136729346,"sku":"KSH70-016","price":65.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0618\/0354\/files\/03b2bf41f08cdfe3d7b9909932be8313_f5a3d9ca-058c-4735-8534-6f47440a1a29.jpg?v=1780566733"},{"product_id":"kooks-shelby-gt500-1-3-4-long-tube-headers-w-3-collectors","title":"Kooks 1-3\/4\" x 3\" SS Headers. 2011-2014 Shelby GT500. - 11422200","description":"\u003cp\u003e\u003cstrong\u003eLethal Performance\u003c\/strong\u003e is proud to announce the \u003cstrong\u003eKooks Custom Longtube Header System for the Shelby GT500\u003c\/strong\u003e.  If you guys don't know Kooks has been bending and welding custom  headers for over 30 years! The end result is one of the nicest works of  art that you could ever imagine putting on your car. \u003cbr\u003e The Kooks Custom Headers for the GT500 are Mandrel Bent out of T-304  Stainless Steel and welded with one thing in mind...\"Precision\"\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eThe Shelby GT500 Headers are also made with 1-3\/4\" Primaries which all  flow into a 3\" Merge Collector and with your choice of X-Pipe.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTesting with these headers yielded 38rwhp and 40lbs of Tq with the Catted X-Pipe Version.\u003c\/strong\u003e Not only do these headers add performance but the sound of your Shelby  will be turned into what it should be. A deep muscle car sound is what  you can expect from these bad boys!!!\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eThe Kooks header kit comes complete with all necessary hardware and 02 extensions!\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eIf you have any questions regarding any of Kooks exhaust products please  feel to call your Lethal Performance Sales Associate today.\u003c\/p\u003e","brand":"Kooks","offers":[{"title":"Default Title","offer_id":48141322551554,"sku":"KOO-11422200","price":1717.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0618\/0354\/files\/86b106cf04c557b46b128d949ff17437_5.jpg?v=1784983478"},{"product_id":"kooks-shelby-gt500-1-7-8-long-tube-headers-w-3-collectors","title":"Kooks 1-7\/8\" x 3\" SS Headers. 2011-2014 Shelby GT500. - 11422400","description":"\u003cp\u003e\u003cstrong\u003eLethal Performance\u003c\/strong\u003e is proud to announce the \u003cstrong\u003eKooks Custom Longtube Header System for the Shelby GT500\u003c\/strong\u003e. If you guys don't know Kooks has been bending and welding custom headers for over 30 years! The end result is one of the nicest works of art that you could ever imagine putting on your car.\u003cbr\u003e\nThe Kooks Custom Headers for the GT500 are Mandrel Bent out of T-304 Stainless Steel and welded with one thing in mind...\"Precision\"\u003c\/p\u003e\n\u003cp\u003eThe Shelby GT500 Headers are also made with 1-7\/8\" Primaries which all flow into a 3\" Merge Collector and with your choice of X-Pipe.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTesting with these headers yielded 38rwhp and 40lbs of Tq with the Catted X-Pipe Version.\u003c\/strong\u003e Not only do these headers add performance but the sound of your Shelby will be turned into what it should be. A deep muscle car sound is what you can expect from these bad boys!!!\u003c\/p\u003e\n\u003cp\u003eThe Kooks header kit comes complete with all necessary hardware and 02 extensions, and they must be paired with one of the available Kooks Midpipes.  Check out your options \u003ca href=\"https:\/\/www.lethalperformance.com\/shop-now\/vehicle-selector\/ford-svt-gt500-shelby\/2013-2014-shelby-5-8-l-gt500\/2013-shelby-gt500-exhaust\/2013-shelby-gt500-midpipes\/kooks?limit=18\" target=\"_blank\"\u003eHERE.\u003c\/a\u003e \u003c\/p\u003e\n\u003cp\u003eIf you have any questions regarding any of Kooks exhaust products please feel to call your Lethal Performance Sales Associate today.\u003c\/p\u003e","brand":"Kooks","offers":[{"title":"Default Title","offer_id":48141322649858,"sku":"KOO-11422400","price":1881.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0618\/0354\/files\/3d39074d07b67806a03af00015fb719a_5.jpg?v=1784983479"},{"product_id":"kooks-3-x-2-3-4-oem-ss-off-road-race-only-x-pipe-2011-2014-shelby-gt500-11423100","title":"Kooks 3\" x 2-3\/4\"(OEM) SS Off-Road Race Only X-Pipe. 2011-2014 Shelby GT500. - 11423100","description":"Kooks Shelby GT500 3\" High Flow Off Road X Pipe bolts to all cat-backs that use factory 2-3\/4\" diameter tubing at the factory connection point. 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If you guys don't know Kooks has been bending and welding custom  headers for over 30 years! The end result is one of the nicest works of  art that you could ever imagine putting on your car. \u003cbr\u003e The Kooks Custom Headers for the GT500 are Mandrel Bent out of T-304  Stainless Steel and welded with one thing in mind...\"Precision\"\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eThe Shelby GT500 Headers are also made with 1-7\/8\" Primaries which all  flow into a 3\" Merge Collector and with your choice of X-Pipe.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTesting with these headers yielded 38rwhp and 40lbs of Tq with the Catted X-Pipe Version.\u003c\/strong\u003e Not only do these headers add performance but the sound of your Shelby  will be turned into what it should be. A deep muscle car sound is what  you can expect from these bad boys!!!\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eThe Kooks header kit comes complete with all necessary hardware and 02 extensions!\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eIf you have any questions regarding any of Kooks exhaust products please  feel to call your Lethal Performance Sales Associate today.\u003c\/p\u003e","brand":"Kooks","offers":[{"title":"Default Title","offer_id":48141323763970,"sku":"KOO-11322400","price":1666.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0618\/0354\/files\/32cb8fb1712466fa2011039c541c6fed_4.jpg?v=1784983486"},{"product_id":"kooks-07-2010-shelby-gt500-1-3-4-long-tube-headers-w-3-collectors","title":"Kooks 1-3\/4\" x 3\" SS Headers. 2007-2010 Shelby GT500. - 11322200","description":"\u003cp\u003e\u003cstrong\u003eLethal Performance\u003c\/strong\u003e is proud to announce the \u003cstrong\u003eKooks Custom Longtube Header System for the Shelby GT500\u003c\/strong\u003e.  If you guys don't know Kooks has been bending and welding custom  headers for over 30 years! The end result is one of the nicest works of  art that you could ever imagine putting on your car. \u003cbr\u003e The Kooks Custom Headers for the GT500 are Mandrel Bent out of T-304  Stainless Steel and welded with one thing in mind...\"Precision\"\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eThe Shelby GT500 Headers are also made with 1-3\/4\" Primaries which all  flow into a 3\" Merge Collector and with your choice of X-Pipe.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTesting with these headers yielded 38rwhp and 40lbs of Tq with the Catted X-Pipe Version.\u003c\/strong\u003e Not only do these headers add performance but the sound of your Shelby  will be turned into what it should be. A deep muscle car sound is what  you can expect from these bad boys!!!\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eThe Kooks header kit comes complete with all necessary hardware and 02 extensions!\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eIf you have any questions regarding any of Kooks exhaust products please  feel to call your Lethal Performance Sales Associate today.\u003c\/p\u003e","brand":"Kooks","offers":[{"title":"Default Title","offer_id":48141323829506,"sku":"KOO-11322200","price":1503.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0618\/0354\/files\/d84bb46c5a78ec627bb287597a19a3ea_4.jpg?v=1784983487"},{"product_id":"kooks-3-x-2-1-2-oem-ss-off-road-race-only-h-pipe-2007-2010-shelby-gt500-11323400-for-kooks-headers-to-oem-2-5-catbacks","title":"Kooks 3\" x 2-1\/2\" (OEM) SS Off-Road Race Only H-Pipe. 2007-2010 Shelby GT500. - 11323400 (For Kooks Headers to OEM \/ 2.5\" Catbacks)","description":"3\" x 2-1\/2\" Off-Road Race Only Stainless H-Pipe. 2007-2010 Ford Shelby GT500 5.4L 4V. \u003cstrong\u003eMust be used with Kooks Headers. 2-1\/2\" OUTLET CONNECTS TO OEM EXHAUST.\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003e NOTE: MUST BE USED WITH KOOKS HEADERS\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\n3\" x 2-1\/2\" (OEM) Competition Only Stainless Steel H-Pipe. 2007-2010 Ford Shelby GT500 5.4L 4V.\u003cbr\u003e\n3\" 16GA 304 Stainless Steel construction\u003cbr\u003e\nBall and socket style connection to Headers\u003cbr\u003e\nRequires Kooks Long Tube Headers\u003cbr\u003e\nIncludes Clamps\u003cbr\u003e\n2-1\/2\" outlet connects to OEM Exhaust re-using OEM Clamps(Not Included)\u003cbr\u003e","brand":"Kooks","offers":[{"title":"Default Title","offer_id":48141324157186,"sku":"KOO-11323400","price":1299.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0618\/0354\/files\/b2ede4ddc8fd4a5b25502756e6edc922.jpg?v=1784983487"},{"product_id":"kooks-3-x-2-3-4-oem-ss-off-road-race-only-h-pipe-2011-2014-shelby-gt500-11423400","title":"Kooks 3\" x 2-3\/4\"(OEM) SS Off-Road Race Only H-Pipe. 2011-2014 Shelby GT500. - 11423400","description":"3\" Stainless Steel Off Road H-Pipe\u003cbr\u003e2 3\/4\" Outlet For Use With Factory Size Cat Back Exhaust\u003cbr\u003eMust Be Used With Kooks Long Tube Headers\u003cbr\u003eThese products are not legal for sale, installation, or use on licensed vehicle in the state of California. 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