Universal 5" Optimal Flow Muffler

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Straight-through flow, T409 polished stainless, non-directional design. The Universal 5" Optimal Flow Muffler fits any 5" aftermarket straight pipe exhaust system on Powerstroke, C ummins, and Duramax trucks, with internal stainless steel mesh and fiberglass to absorb resonance and reduce back pressure.On the dimensions: it runs a 5-inch inner diameter at both the inlet and outlet, an overall length of 20.25 inches, a 14-inch body, and an 8-inch round body size. The straight-through, non-directional design means you can install it in either orientation, and it's built to cut back pressure rather than choke flow.For installation, measure and cut your current exhaust so it fits. Welding it in place is recommended, though you can clamp it on instead. Clamps are not included. It fits all Powerstroke, Cummins, and Duramax models running a 5" aftermarket straight pipe setup, and Alaska, Hawaii, and some Canadian locations may carry additional freight. Show more