Pypes exhaust systems will give you more horsepower, better MPG and a great throaty deep tone. These cross-member back systems are made of 16-gauge 409 stainless steel with a natural finish. All Pypes systems include an X-Pipe for a balanced flow with minimal back pressure thus maximizing HP. The system includes slip-fit tubing, stainless steel hangers and zinc coated clamps. Designed to exit the rear of the vehicle unless noted. These systems are designed to bolt to your headers or down pipe. Includes instructions. Fits 1966-74 MOPAR B-Body, includes Race Pro Mufflers/ Pypes part number SMB10R33.