I saw this online, I know the 55k guys were having issues with this. Im gonna email the seller and see if its been tested, the seller had sold a cnc machined down stock pulley , milled to 65mm http://www.ebay.com/itm/Mercedes-AMG-C32-Chrysler-Crossfire-SRT-Fix-Supercharger-Pulley-68mm-CNC-Dural/281620643061?_trksid=p2047675.c100011.m1850&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20140602152332%26meid%3Df001f2d3657d4a5cb061edc0f5071357%26pid%3D100011%26rk%3D1%26rkt%3D2%26sd%3D281599401128