For custom or stock exhaust, aFe's stainless steel, universal fit Mach FORCE - XP muffler is designed to provide a deep, throaty, powerful sound on acceleration, yet maintains a smooth sound at idle. Constructed of 409 stainless steel, the Mach FORCE - XP muffler uses a straight through perforated core with heat resistant packing to reduce backpressure and maximize exhaust flow for performance and sound improvements over the factory exhaust. Stainless Steel Construction Constructed of 409 stainless steel for long lasting strength and durability. Design and Sound Designed for exhaust gasses to travel straight through the heat resistant perforated core for a remarkable tone. Universal Fit Universal muffler fits 3 stainless steel tubing. Muffler does not come slotted. Muffler Specifications Configuration 3 Center Inlet 3 Center Outlet. Size 14 body length, 6 diameter round body, unslotted. Stamped with an aFe POWER Logo Features an aFe POWER logo stamped onto the muffler for quality, brand authenticity.