Originally posted by AccordSleeper
I believe since UR sells the crank pulley they don't underdrive as much as AEM does. I remember reading somewhere that UR said AEM underdrives too much, to make up for not underdriving the crank pulley. So it doesn't surprise me that you have no problems.
yet the UR pullies gives you the most gains compared to AEM because they do replace the Crank pulley....but to keep things in perspective this is not going to give you more than 5 hp at the wheels