Crankshaft Pulley Under Drive Billet Viper 92-17

New billet aluminum crankshaft under drive pulley.  Choose the correct fit for Dodge Viper 1992-2017.  Under drive pulleys slow down the speed of all accesories to help with water pump cavitation at high RPM's, reduces wear on rotating accessories and adds 5-10HP by slowing the belt speed.  Includes mounting bolts. 

*03-06 uses 5/16" bolts

*08-17 Uses 8mm bolts.

*These pulleys will require a shorter than stock belt.  Please see our belts for options.