[1990 quasar blue]

Originally Posted by 8upZR1

Yes, I will elaborate. The HP increase from the pulleys was noticeable enough for me to feel it when I first put them on, which ussually does not happen with a mere pulley swap. I am not saying that I gained 50 HP or anything but the difference was noticeable, particularly when powershifting, as the car had a more violent side to side wiggle. I dunno #'s but it was a pleasant increase especially when considering that there are hardly any bolt ons available for ZR1's, and even fewer are cheap. Also I have not experienced any problems what so ever regarding engine temp or electrical charge. The pulleys I got were also beautifully machined and fit sans hassle. You can not ask for more from a mere peice of aluminum.

Thanks much.