Equip your semi to be Ready for the Road Ahead , with the Power Products 4" Aluminized 90° Exhaust Elbow, a crucial component in directing fumes away from passengers. Due to its ability to pipe smoke away from the motor, this replacement exhaust elbow is able to minimize noise levels while increasing engine performance. Constructed with de-burred and finished end cuts for user-friendly handling. FleetPride is your First Click in Heavy Duty .