Constructed of 304 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 3" stainless steel tubing. See below for specifications. 3 IN Inlet (Center) / 3 IN Outlet (Dual),  22 IN L x 11 INW x 6 IN H Body. Features an aFe POWER logo stamped onto the muffler for quality, brand authenticity.