Well, I just pulled the trigger on a 1998 C43 after driving and M3 for several years. I need to know if there is anything to be done about the crappy throttle response, the cars been to the dealer everything checks out. I ordered K&N filters hoping that might help. Also does anyone know of a transmission software upgrade like the one Dinan offers for BMW that firm up the shifts. The C43 has a great motor but the combination poor throttle rersponse with a sloppy tranny make for a disappionting drive. I hope there is another solution other than buying RennTech cold air intake and software for $5400!