Quote Originally Posted by DnaProdigy View Post
I have purchased [but not yet installed] the quickchange MPS from pfyc.com. In case you didn't know the modular pulleys are the ones that are interchangeable. A press on pulley is changeable but you need s special tool which will run you about another $150. The payment [$150] and shipping was fast and easy, also additional pulleys are only $80.

If you go with a MPS i recommended putting locktite threadlocker on the bolts so their is no problem with vibration and them slipping out. Use the blue kind tho otherwise you could have problems removing the bolts in the future.

If you list what year your gp is and what mods you have we could recommend the proper size so you don't get too much Kr.
I've never used loctite on the ZZP hub/pulley combo and have never had a bolt come loose even with the extra vibes from the XP cam. IIRC back in that day I asked about loctitie and it wasn't needed. I'm sure the threadlock won't hurt, but really isn't needed.

For $99 you get a ZZP hub and pulley and additional pullies are $50

Now these South Florida Pulley Headquarters - Your source for supercharged performance products!
look to be a very high quality. If I didn't have the ZZP MPS then these would be my next choice.