I would never buy them but I believe some where on here there is a before and after run on a track with and with out the supercharger and with and without nitrous I believe it is paul there was a minimal not worth it increase... I didn't see his trap times but the only one I have seen worth buying for the crossfire requires 6 battery's in the trunk http://www.turbomagazine.com/tech/04...rcharger/Tomas Knight http://www.boosthead.com/home.php for 2k though for that much you might as well save for a real turbo and tune...


Try this if that doesn't work...
http://www.turbomagazine.com/tech/04..._supercharger/