I personally purchased a WPI Extreme IC Supercharger for my car. I've compared both the WPI and ZZP ones. I've seen/dealt with both, and after that, I decided and made my purchase. The quality of work that goes into them is second to none, and the performance out of it should be well worth my money.
A forum community dedicated to all General Motors makes and models owners and enthusiasts running the 3800 series engine. Come join the discussion about performance, modifications, classifieds, troubleshooting, builds, tunes, superchargers, maintenance, and more!