Outfit your semi to be Ready for the Road Ahead with an efficient way of directing fumes away from passengers, with the Power Products 4" Aluminized 45° Exhaust Elbow. To increase engine performance and decrease noise levels, this replacement exhaust elbow pipes smoke away from the motor to increase performance - while decreasing noise levels. Fashioned with de-burred and finished end cuts for safe handling. FleetPride is your First Click in Heavy Duty .