{"product":{"id":11350218375510,"title":"Kooks ULTRA X-Pipe Connection-Back Exhaust for Mustang GT (2018-2026)","body_html":"\u003ch2\u003eChoose how you want your Mustang to sound\u003c\/h2\u003e\u003cp\u003eYou should enjoy your exhaust on the journeys you actually make, as well as when you open the throttle. This Kooks connection-back system gives your 2018-2026 Mustang GT a choice of Shotgun or Touring mufflers, active valves and polished stainless or carbon-fibre tips. It completes a matching Kooks long tube header and front-connection setup with 3\" stainless pipework and an ULTRA X-pipe.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSKUs:\u003c\/strong\u003e 11515700, 11515720, 11515750, 11515770\u003c\/p\u003e\u003ch2\u003eShotgun or Touring\u003c\/h2\u003e\u003cp\u003eChoose Shotgun if a louder, more open exhaust character is what excites you. Touring is aimed at a more refined experience, with reduced unwanted cabin drone as a design priority. Neither choice promises a particular sound level or a drone-free cabin: your headers, catalysts and how you use the car still affect what you hear.\u003c\/p\u003e\u003ch2\u003eActive valves using the factory actuators\u003c\/h2\u003e\u003cp\u003eThe installation reuses the factory active-exhaust actuator motors and springs on the Kooks valved mufflers. That makes your car's existing active-exhaust equipment part of the fitting requirements. The package is not supplied as a separate app-controlled or remote-controlled valve conversion.\u003c\/p\u003e\u003ch2\u003eA full 3\" system with the finish you prefer\u003c\/h2\u003e\u003cp\u003eMandrel-bent 304 stainless pipework and a long-merge ULTRA X-pipe run into 3\" valved mufflers. Four 4\" slash-cut tips finish the rear: choose polished stainless for a bright metal finish or carbon fibre for a darker look. Tip finish changes the appearance, not the Shotgun or Touring muffler specification.\u003c\/p\u003e\u003ch2\u003eComplete the Kooks header setup\u003c\/h2\u003e\u003cp\u003eThis is a connection-back system. It requires Kooks long tube headers and front connection pipes, purchased separately. We recommend professional fitting so the valve equipment, hangers, tip alignment and heat clearance are checked together, then rechecked after the first heat cycle.\u003c\/p\u003e\u003ch2\u003eChoose your option\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eSKU\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eMuffler Type\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eTip Color\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eFitting \/ contents\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e11515700\u003c\/td\u003e\n\u003ctd\u003eShotgun Mufflers\u003c\/td\u003e\n\u003ctd\u003ePolished\u003c\/td\u003e\n\u003ctd\u003e3\" connection-back system; ULTRA X-pipe and four 4\" tips; Kooks headers and front connections required.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e11515720\u003c\/td\u003e\n\u003ctd\u003eShotgun Mufflers\u003c\/td\u003e\n\u003ctd\u003eCarbon\u003c\/td\u003e\n\u003ctd\u003e3\" connection-back system; ULTRA X-pipe and four 4\" tips; Kooks headers and front connections required.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e11515750\u003c\/td\u003e\n\u003ctd\u003eTouring Mufflers\u003c\/td\u003e\n\u003ctd\u003ePolished\u003c\/td\u003e\n\u003ctd\u003e3\" connection-back system; ULTRA X-pipe and four 4\" tips; Kooks headers and front connections required.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e11515770\u003c\/td\u003e\n\u003ctd\u003eTouring Mufflers\u003c\/td\u003e\n\u003ctd\u003eCarbon\u003c\/td\u003e\n\u003ctd\u003e3\" connection-back system; ULTRA X-pipe and four 4\" tips; Kooks headers and front connections required.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eVehicle fitment\u003c\/h2\u003e\u003ctable class=\"vehicle-fitment\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eYears\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eVehicle and trim\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eEngine\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eApplicable SKU \/ fitting conditions\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2018-2026\u003c\/td\u003e\n\u003ctd\u003eFord Mustang GT\u003c\/td\u003e\n\u003ctd\u003e5.0L V8\u003c\/td\u003e\n\u003ctd\u003e11515700, 11515720, 11515750, 11515770\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2018-2026\u003c\/td\u003e\n\u003ctd\u003eFord Mustang GT Premium\u003c\/td\u003e\n\u003ctd\u003e5.0L V8\u003c\/td\u003e\n\u003ctd\u003e11515700, 11515720, 11515750, 11515770\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2019-2020\u003c\/td\u003e\n\u003ctd\u003eFord Mustang Bullitt\u003c\/td\u003e\n\u003ctd\u003e5.0L V8\u003c\/td\u003e\n\u003ctd\u003e11515700, 11515720, 11515750, 11515770\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2021-2023\u003c\/td\u003e\n\u003ctd\u003eFord Mustang Mach 1\u003c\/td\u003e\n\u003ctd\u003e5.0L V8\u003c\/td\u003e\n\u003ctd\u003e11515700, 11515720, 11515750, 11515770\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\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\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eMustang GT 5.0, 2018-2026, with the required Kooks header and front connections\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem type\u003c\/td\u003e\n\u003ctd\u003eULTRA X-pipe connection-back exhaust\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eMandrel-bent 304 stainless steel; 3\" pipework\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMuffler choices\u003c\/td\u003e\n\u003ctd\u003e3\" active-valve Shotgun or Touring mufflers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTip specification\u003c\/td\u003e\n\u003ctd\u003eFour 4\" slash-cut tips; polished stainless or carbon fibre\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve equipment\u003c\/td\u003e\n\u003ctd\u003eReuses factory active-exhaust actuator motors and springs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRequired front exhaust\u003c\/td\u003e\n\u003ctd\u003eKooks long tube headers and front connection pipes, purchased separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eFAQs\u003c\/h2\u003e\u003ch3\u003eWhich muffler should I choose for everyday driving?\u003c\/h3\u003e\u003cp\u003eTouring is the choice to consider if cabin refinement matters most; Shotgun suits a preference for a louder, more open character. Your catalyst and header combination will influence both.\u003c\/p\u003e\u003ch3\u003eWill it connect straight to the factory front exhaust?\u003c\/h3\u003e\u003cp\u003eThis connection-back version needs Kooks long tube headers and front connection pipes. Choose an OEM-front-connection cat-back if you want to retain the factory front arrangement.\u003c\/p\u003e\u003ch3\u003eAre new valve actuator motors supplied?\u003c\/h3\u003e\u003cp\u003eThe fitting guide uses your factory active-exhaust motors and springs. Have those available for installation.\u003c\/p\u003e\u003ch3\u003eDoes carbon fibre change the sound?\u003c\/h3\u003e\u003cp\u003eThe tip option changes the finish. Choose the muffler style for the sound character.\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":"2026-10-08T10:41:45+01:00","handle":"kooks-2018-2026-ford-mustang-gt-5-0l-ultra-x-connection-back-exhaust","updated_at":"2026-10-12T14:17:49+01:00","published_at":"2026-10-09T13:07:18+01:00","template_suffix":null,"published_scope":"global","tags":"brand:kooks, cat:exhausts, dept:performance-parts, fits:ford-mustang, make:ford, type:exhaust-system","variants":[{"id":55646910513494,"product_id":11350218375510,"title":"Shotgun Mufflers \/ Polished","price":"2748.09","sku":"11515700","position":1,"compare_at_price":"","fulfillment_service":"manual","inventory_management":null,"option1":"Shotgun 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