DMR-5065 Serpentine Pulley Sets

Description

Billet 5-piece aluminum Serpentine-belt pulley set to convert a standard V-belt system to the newer style Serpentine set-up. It will fit 1965-1990 Oldsmobile V-8 engines and will work with either long or short water pumps. Included are 2 sets #DMR-8230 spacer kit will adapt short water pump to fit in place of longer A/C pump. Great for show application and will help eliminate throwing belts under high RPM applications. Comes with a black hard coat finish to prevent the belt from wearing the pulleys as can happen with normal aluminum pulley sets. Includes pulleys for water pump, alternator, crank, keyed power steering, and idler pulley, plus idler pulley bracket. Approximately 20% underdrive. For cars with higher RPM usage or race usage. Higher RPM will move water too fast and water will not stay in the radiator long enough to cool properly. AC will run with a V-belt-off groove on the back of the water pump pulley.

Underdrive has 4″ crank pulley
Street has a 6″  crank pulley.