{"product_id":"fp-performance-street-series-chambered-muffler-mustang-cobra-irs","title":"FP Performance Street Series Chambered Muffler – Mustang Cobra IRS (PRE-ORDER NOW)","description":"\u003cp\u003eFP Performance Street Series chambered mufflers are built for enthusiasts who want a deep, refined muscle car tone, high-flow performance, and premium stainless steel construction.\u003c\/p\u003e\n\u003cp\u003eOur new \u003cstrong\u003eoffset\/offset same-side Street Series muffler configuration\u003c\/strong\u003e was developed specifically for \u003cstrong\u003eFord Mustang Cobra applications equipped with IRS, or independent rear suspension\u003c\/strong\u003e. Unlike traditional offset\/offset mufflers where the inlet and outlet are positioned on opposite sides of the muffler case, this same-side configuration places both the inlet and outlet on the same side of the muffler body. This makes it ideal for IRS-style exhaust routing found on Cobra applications.\u003c\/p\u003e\n\u003cp\u003eAvailable in both \u003cstrong\u003e2.5\" and 3\" inlet\/outlet sizes\u003c\/strong\u003e, this configuration gives Mustang Cobra owners a clean, purpose-built muffler option for IRS-equipped exhaust systems without the need for unnecessary custom fabrication.\u003c\/p\u003e\n\u003cp\u003eLike all FP Performance products, our Street Series mufflers are manufactured from high-quality, corrosion-resistant \u003cstrong\u003e304 stainless steel\u003c\/strong\u003e for long-lasting durability and a premium polished finish. Inside the muffler, we utilize our proven internal flow chamber design, which provides multiple exhaust flow paths to reduce restriction and support improved horsepower and torque.\u003c\/p\u003e\n\u003cp\u003eThose exhaust paths also encounter built-in Helmholtz chambers that help reduce drone while producing the deep, aggressive, and more refined tone the Street Series is known for. Whether you are replacing mufflers on an IRS Cobra system or building a custom exhaust setup, this offset\/offset same-side configuration provides the fitment, sound, and quality your Mustang deserves.\u003c\/p\u003e\n\u003cp\u003eSpecifications:\u003c\/p\u003e\n\u003cp\u003eMuffler Style: Chambered\u003c\/p\u003e\n\u003cp\u003eMuffler Series: Street Series\u003c\/p\u003e\n\u003cp\u003eMuffler Configuration: Offset \/ Offset Same Side\u003c\/p\u003e\n\u003cp\u003eAvailable Sizes: 2.5\" Inlet\/Outlet or 3\" Inlet\/Outlet\u003c\/p\u003e\n\u003cp\u003eApplication: Ford Mustang Cobra with IRS \/ Independent Rear Suspension\u003c\/p\u003e\n\u003cp\u003eFlow Type: Directional\u003c\/p\u003e\n\u003cp\u003eMuffler Body Finish: Polished\u003c\/p\u003e\n\u003cp\u003eDimensions: \u003cspan\u003e14x10x4.5\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eOverall Length: 19.5\"\u003c\/p\u003e\n\u003cp\u003eConstruction: 16-gauge body, 12-gauge internal chamber, 304 stainless steel\u003c\/p\u003e\n\u003cp\u003eMuffler Body Shape: Oval\u003c\/p\u003e\n\u003cp\u003eMuffler Sound: Deep \/ Aggressive \/ Refined\u003c\/p\u003e","brand":"FP Performance Premium Exhaust Systems","offers":[{"title":"2.5 in","offer_id":51985997431080,"sku":"FP-OOSS-25-SS","price":124.95,"currency_code":"USD","in_stock":true},{"title":"3 in","offer_id":51985997463848,"sku":"FP-OOSS-30-SS","price":124.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0844\/8602\/9608\/files\/Screenshot2026-06-17105416.png?v=1781708315","url":"https:\/\/fpperformanceexhaust.com\/products\/fp-performance-street-series-chambered-muffler-mustang-cobra-irs","provider":"FP Performance Premium Exhaust Systems","version":"1.0","type":"link"}