March Performance 4050 - March GM Pulleys

Computer design assures your electrical and cooling systems run properly while your engine runs easier and their deep grooves eliminate belt throwing. CNC-machined from solid billet aircraft-grade materials with maintenance-free black or clear polished powdercoating.

Performance Series
Increases horsepower by reducing accessory drag. Typical 12.5 HP at the rear wheels.

Power and Amp Series
Designed for vehicles with high amperage needs. Excellent for towing and heavy stop-and-go driving. Increases horsepower by reducing accessory drag. Typical 11 HP at the rear wheels.