Perrin Lightweight Crank Pulley Black WRX (2002-2014) STI (2004-2018) Wheels Extreme noise and harshness can

Extreme noise and harshness can be expected with the solid bushings

Weather you have a street

maintains maximum boost longer in the rpm range

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

This is a great upgrade for any Gen 1 MINI Cooper

Perrin Lightweight Crank Pulley Black WRX (2002-2014) STI (2004-2018) Wheels Extreme noise and harshness canPerrin'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