Installed a used AA supercharger kit on my 98 M3. Although I bought it second hand the customer support at Active is superb! Thanks Craig you deserve a raise. I put down 314 whp and 256trq with a little 112 race gas mix. This kit is worth it drivability isn't sacrificed. Ran a 13.2 @107.9 not launching hard. I think I'll be getting in the 12's with a better 60 ft. S52's seem to run well on forced induction no complaints as of yet. Keep up the good work Active!