Perrin Lightweight Crank Pulley Black WRX (2002-2014) STI (2004-2018) Wheels maintains maximum boost longer in

maintains maximum boost longer in the rpm range

our super locking mechanism will not harm the threads of your OEM shifter rod

AEM performance strut bars lock the tops of your struts together to reduce strut movement in extreme conditions

and overall condition of your vehicle

Perrin Lightweight Crank Pulley Black WRX (2002-2014) STI (2004-2018) Wheels maintains maximum boost longer inPerrin's lightened crank pulley for the Subaru WRX STI LGT is engineered to reduce rotating mass, increasing horsepower and torque. Made from 6061T6 aluminum and weighing 1. 2lbs, Perrin crank pulley is more then 4lbs lighter then the stock crank pulley. Perrin's pulley is not underdriven and will not affect the life of your engine. The pulley is simply a redesigned, lighter version of the stock crank pulley. Aftermarket underdrive pulleys are prone