The Grand Rock 5 Inch OD/ID Muffler is designed for high horsepower engines. With a Type 1 build, it measures 9"X 34" and has a 5" OD/ID. Made with aluminized material, it features an inlet diameter of 5" OD and an outlet diameter of 5" ID. The body diameter is 9" with a length of 34", and the overall length is 40.5". Stainless steel options are available upon request. This muffler is sold individually and is perfect for high horsepower engines.