The new Pro-Billet Pulleys are smaller in diameter for engines that see a lot of low rpm operation, such as street rods. This is especially important on cars that have the AC set on freeze, with the radio cranking and while the electric fuel and water pumps are humming along.

Each Pulley is cut from a billet of aluminum and is supplied with a great looking MSD cap to cover the mounting nut. The Pulleys are designed to give you an approximate 3:1 ratio with a standard crankshaft pulley.