Constructed of 409 stainless steel for long lasting strength and durability. Designed for exhaust gasses to travel straight through the heat resistant perforated core for a remarkable tone. Universal muffler fits 2-1/2" stainless steel tubing. See below for specifications. Configuration: 2-1/2 IN Dual Inlet/Dual Outlet, 5 IN x 8 IN x 18 IN Body. Features an aFe POWER logo stamped onto the muffler for quality, brand authenticity.