Constructed of 304 stainless steel for long lasting strength and durability. Designed for exhaust gases 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" inlet/outlet center/offset 4" x 9" x 18" body length. Features an aFe POWER logo stamped onto the muffler for quality, brand authenticity.