Universal 4" Armor Plus High Flow Muffler (M91031)

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Description Fits: Universal 4" Built for diesel owners who want sound, flow, and durability without compromise, this MBRP XP Series muffler delivers reduced backpressure and a deep , classic diesel tone. Its heavy-duty T409 stainless steel construction is designed to withstand harsh climates, road debris, and long-term abuse while keeping exhaust flow free. Part Number: M91031 Features High-flow exhaust design T409 stainless construction 4-inch inlet and outlet Aggressive diesel tone Long-life packed core Corrosion-resistant build 30" Overall length 24" Body length 6" Body Diameter Notes Universal 4-inch inlet and outlet, replaces any 30-inch overall length muffler. Show more