Perrin Lightweight Crank Pulley Black WRX (2002-2014) STI (2004-2018) Mazda NOTE: Does not fit 2011-2012

NOTE: Does not fit 2011-2012 WRX/STI with fog lights

The intake provides gains in horsepower and torque across the entire rev range

45% torque capacity over stock

they also include precise control dump valves

Caster Explained

Perrin Lightweight Crank Pulley Black WRX (2002-2014) STI (2004-2018) Mazda NOTE: Does not fit 2011-2012Perrin'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