Perrin Performance Crank Pulley WRX / STI / Legacy GT Subaru Turbo Models 2002-2019
Aftermarket underdrive pulleys are prone to charging and drivability problems, the Perrin pulley avoids these potential problems by exactly copying the OEM piece. The reduction at the crank shaft is effectively the same as removing 100 pounds of weight from your vehicle. Perrin's crank pulley will not wear out engine bearings or the oil pump, and will not add any additional vibration or noise. Installation is straight forward and can be done without jacking the vehicle or removing anything other than the belt cover, belts and stock crank pulley.
Fitment: 02+ wrx, 04+ sti, 05+ legacy gt
Part Number: PSP-ENG-100
WARNING: Cancer and Reproductive Harm
After researching hours comparing weights, this is hands down the lightest one I found. It might not be the cheapest, but its definitely not the most expensive one either. So for being the lightest one available and fairly priced, it's a not brainer for faster revs, but be careful with pairing this with a light weight flywheel it becomes alot easier to stall, and you might get the phantom misfire code, however the code can be disabled so no big deal.
This perrin crank pulley does what it says. Faster ribs and faster deceleration. I highly recommend this product
Satisfied is quality highly recommend.