The Powerflow 4 Inch Muffler is a Type 1 muffler with dimensions of 8"X 15" and a 4" ID/ID. It features aluminized construction and has an inlet diameter (A) and outlet diameter (B) of 4" ID, a body diameter (C) of 8", a body length (D) of 15", and an overall length (E) of 21.5". Stainless steel options are available, and it fits Powerflow models. This muffler is sold individually and offers durable, high-quality performance for your vehicle's exhaust system. Contact us for more information on stainless steel options.