Universal 5" Optimal Flow Muffler

 Feature 5 Inch Material T409 PolishedStainless Steel Inlet Size 5-inch inner diameter Outlet Size 5-inch inner diameter Overall Length 20.25 Inches Body Length 14 inches Body Size 8-inch round Vehicle Fitment Our mufflers fit all Powerstroke, Cummins and Duramax models available on our website. This will fit any 5" aftermarket straight pipe exhaust system.  Installation You will have to measure and cut your current exhaust for this to fit. We recommend welding the muffler in place. However, you can also clamp them on. Clamps are NOT included.  Product Features Straight-through flow path for maximum performance Non-directional design, allowing you to install the muffler in however way suites your truck and exhaust system best. Stainless steel construction for lifelong protection (polished) Internal stainless steel mesh & fiberglass construction to withstand harsh conditions and advanced technology to absorb unwanted interior resonance. Straight-through design to reduce back pressure and enhance performance  * Note: Alaska, Hawaii and some Canadian locations will be subject to additional freight charges