{"product_id":"milltek-active-valved-cat-back-with-h-pipe-system-polished-tips-2026-mustang-5-0l-gt-fastback","title":"Milltek Active Valved Cat-Back with H-Pipe System (Polished Tips) – 2026 Mustang 5.0L GT Fastback","description":"\u003cdiv class=\"description\"\u003e\n    \u003cp\u003eThe \u003cstrong\u003eMilltek Active Valved Cat-Back with H-Pipe\u003c\/strong\u003e and \u003cstrong\u003ePolished Tips\u003c\/strong\u003e is a go-to upgrade for Mustang GT owners who want a throatier sound, better flow, and a clean, timeless look out back. If you're tired of your GT sounding like it's stuck in comfort mode—even when it's not—this system delivers the tone and performance your 5.0L Coyote was built for.\u003c\/p\u003e\n    \n    \u003ch2\u003eWhat It Solves\u003c\/h2\u003e\n    \u003cp\u003eThe factory exhaust system on the 2026 GT Fastback is muted, especially for a car that’s supposed to be performance-first. The valves are there, but the sound lacks character and the restrictive design holds back power. Milltek’s cat-back system fixes that by improving exhaust flow and giving you full control over sound levels—all while maintaining daily drivability.\u003c\/p\u003e\n    \n    \u003ch2\u003eWhat It Improves Over Stock\u003c\/h2\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cstrong\u003eImproved exhaust velocity\u003c\/strong\u003e and reduced backpressure with a more aggressive tone\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eFactory valve motor compatibility\u003c\/strong\u003e means you keep sound control, but with better results\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003ePolished tips\u003c\/strong\u003e give your rear end a clean, premium finish that stands out without screaming for attention\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eMore responsive throttle\u003c\/strong\u003e and refined sound that matches your mods\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \u003cp\u003eYou’ll find this setup under our \u003ca href=\"https:\/\/www.lethalperformance.com\/shop-now\/vehicle-selector\/ford-mustang-v8-gt\/2026-2025-mustang-gt\/exhaust\/catbacks\"\u003e2026-2025 Mustang GT Cat-Back Exhaust systems\u003c\/a\u003e—it’s a solid middle ground between mild and wild.\u003c\/p\u003e\n    \n    \u003ch2\u003eKey Features \u0026amp; Benefits\u003c\/h2\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cstrong\u003eActive Valve Integration\u003c\/strong\u003e: Reuses your factory valve actuators to give you adjustable tone based on driving mode or throttle input.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eH-Pipe Design\u003c\/strong\u003e: Boosts low-end torque and gives the exhaust a smoother, deeper growl—none of the tin-can rasp.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003ePolished Quad Tips\u003c\/strong\u003e: Clean, mirror-like finish for a subtle but refined look.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eFull T304 Stainless Steel Construction\u003c\/strong\u003e: Long-term durability with corrosion resistance and performance that won’t fade over time.\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \u003cp\u003eThis configuration is part of our wider \u003ca href=\"https:\/\/www.lethalperformance.com\/shop-now\/vehicle-selector\/ford-mustang-v8-gt\/2026-2025-mustang-gt\/exhaust\/catbacks\/milltek\"\u003eMilltek cat-back exhaust systems\u003c\/a\u003e selection—if polished tips are your thing, this one checks all the boxes.\u003c\/p\u003e\n    \n    \u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: T304 stainless steel with polished tips\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eWeight Savings\u003c\/strong\u003e: Yes – lighter than OEM due to less restrictive mufflers and higher-grade materials\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eAdjustability\u003c\/strong\u003e: Works with factory active valve system—switch between quiet and aggressive modes without swapping parts\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eAdditional Required Components\u003c\/strong\u003e: None required for install\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003ePart Number\u003c\/strong\u003e: SSXFD429\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \n    \u003ch2\u003eWho This is For\u003c\/h2\u003e\n    \u003cp\u003eThis system is built for \u003cstrong\u003e2026 Mustang GT Fastback owners\u003c\/strong\u003e running the \u003cstrong\u003efactory active exhaust\u003c\/strong\u003e setup. If you want a clean-looking system that sounds noticeably better than stock but won’t blow out your eardrums on the freeway, this one’s for you. It plays nice with other bolt-ons and doesn't require a tune, making it a strong choice for daily-driven cars or first-time exhaust upgrades.\u003c\/p\u003e\n    \u003cp\u003eIf your GT didn’t come with active valves, you’ll need a different system—this one is designed to integrate with factory electronics.\u003c\/p\u003e\n    \n    \u003ch2\u003eFitment \u0026amp; Installation Notes\u003c\/h2\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cstrong\u003eVehicle Compatibility\u003c\/strong\u003e: 2026 Ford Mustang GT Fastback (5.0L V8), automatic or manual\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eDirect Fitment or Requires Modifications\u003c\/strong\u003e: Direct bolt-on; no cutting, welding, or fab work needed\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eInstallation Requirements\u003c\/strong\u003e:\n        \u003cul\u003e\n          \u003cli\u003eReuses OEM active valve motors\u003c\/li\u003e\n          \u003cli\u003eNo tuning or recalibration needed\u003c\/li\u003e\n          \u003cli\u003e\n\u003cstrong\u003eProfessional installation recommended\u003c\/strong\u003e for proper fitment and valve setup\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/li\u003e\n    \u003c\/ul\u003e\n    \n    \u003ch3\u003eWarnings\u003c\/h3\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cstrong\u003eOnly works with factory valved exhaust models.\u003c\/strong\u003e If your GT doesn't have valves, this system will not function correctly.\u003c\/li\u003e\n      \u003cli\u003e\u003cstrong\u003eNot compatible with convertible models.\u003c\/strong\u003e\u003c\/li\u003e\n      \u003cli\u003eThis is a \u003cstrong\u003ecomplete cat-back system\u003c\/strong\u003e, not a rear section swap. If you're still running stock manifolds and mid-pipes, you’ll get some benefit—but pairing it with headers or a performance mid-pipe will maximize gains.\u003c\/li\u003e\n      \u003cli\u003eFor full performance and tone improvement, most buyers should install this as part of a full exhaust upgrade—not piecemeal.\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \n    \u003cp\u003eThis polished-tip Milltek setup strikes a solid balance between clean aesthetics, aggressive sound, and performance gains. It’s a perfect match for anyone who wants to keep things classy while still waking up that Coyote.\u003c\/p\u003e    \n\u003c\/div\u003e\n\u003cstyle\u003e\n    .description a {\n        color: #00a2e5 !important;\n    }\n    .description ul {\n        list-style: disc !important;\n        margin-left: 20px !important;\n        margin-bottom: 30px !important;\n    }\n    .description li {\n        float: none !important;\n    }\n    .description h2 {\n        margin-bottom: 20px;\n        display: block !important;\n    }\n    .description iframe {\n        margin: 30px auto;\n    }\n    .description hr {\n        margin: 30px auto;\n    }\n\u003c\/style\u003e","brand":"Milltek","offers":[{"title":"Default Title","offer_id":48146748113154,"sku":"MTK-SSXFD429","price":3105.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0618\/0354\/files\/ssxfd429.jpg?v=1785009129","url":"https:\/\/www.lethalperformance.com\/products\/milltek-active-valved-cat-back-with-h-pipe-system-polished-tips-2026-mustang-5-0l-gt-fastback","provider":"Lethal Performance","version":"1.0","type":"link"}