Crankshaft Pulley Under Drive Billet Viper 92-17800-1999
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.