Check out the write up in GM High-Tech Performance magazine on the Supercharger. The Dyno showed 254.8 HP @ 5500 and 260.8 ft.-lbs @ 4000 at the rear wheels with 8.65 lbs boost. About 318.5 at the flywheel
Status on my Supercharger from Vector. I am currently running about 10-12 psi.
Pictures of the install.
Dyno Results on my Car