Auto Specialties Crank Pulley with 20 Percent Reduction - Hard Black Aluminum - Nitride - 821120

Crank Pulley: 20% Reduction (Hard Black Aluminum) (Nitride)

Under drive pulley systems increase engine horsepower by reducing the amount of power required to drive external accessories. For example, the alternator, power steering, water pump and air conditioner all rob horsepower from the engine. By replacing factory-sized crank and accessory drive pulleys with a resized pulley, the accessories are slowed, resulting in more horsepower available to drive the rear wheels.

[ASP821120]