Let me start off by saying that installing this was a b!tch!!! Loosening the power steering and the alternator so the belts can go up and around and then pushing both untis abck to make it tense once again was a pain. But it was SO worth it!!! My butt-dyno says that it really freed up lost ponies and revs the car quicker! But I do have a problem...no less than a second I hear a chirp everytime and every gear when I start to rev up slowly. Anybody wanna give a suggestion as to what i can do about it? but yeah....buy this pulley!!

are you blets sufficently tight?? If om not mistaken the perrin pulley is underdriven, which means it is smaller in diameter than stock, so hence if you didnt readjust your belts that where the chirping might be coming from.

You are right in saying the Agency pulley was a _____ to install but worth it. I installed mine on my xB and didn't have any chirping or any funny sounds after the installation at all. Check the tension on your belts and maybe tighten them more and see if that solves the problem. Hope this helps...

The Perrin & the ZPI are NOT underdriven, the Unorthedox one is.