Pulleys

The PERRIN Performance Crank Pulley weighs just 1.2 lbs., which is 4 lbs. lighter than the OEM crank pulley. This reduction in weight from the crankshaft is equal to removing more than 100 lbs. of vehicle weight! Throttle response, horsepower, and torque...

The PERRIN Performance Crank Pulley weighs just 1.2 lbs., which is 4 lbs. lighter than the OEM crank pulley. This reduction in weight from the crankshaft is equal to removing more than 100 lbs. of vehicle weight! Throttle response, horsepower, and torque...

ATI's Super Damper for Subaru EJ20, EJ22 and EJ25 engines - Part # 917991. Unlike undampened underdrive pulleys, which offer no protection to high performance engines, the ATI Super Damper provides balanced dampening of torsional crankshaft vibrations at...

Additional power and RPM from upgrades increases the naturally occurring characteristics of harmful crankshaft torsional vibrations. By installing a Fluidampr viscous damper (crank pulley) you will reduce wear on the main bearings and timing gear,...