•  Includes 3 distinctive rear exhaust headers (medium torque, high torque, and high speed) so you can fine tune the performance to your driving style. Maximize your performance for any track or motor.
•   Made from strong lightweight 6061 Aluminum and polished to a mirror finish.
•   Reinforced stinger for added durability for those brushes with the board.
•   Fits most 1/10th scale sedan and gas trucks.
•   Side set screws for tightening down the pipe for easy maintenance access.
•   Includes all hardware for installation.

Source : RC Car Action