I have had my Z3 Coupe 3.0 for ten years and finally joined Zroadster. I have found your tech forum helpful and thought I should join. I use my Z3 as a HPDE track toy for the most part, although it has been pressed into service as a daily driver for this past winter. (Ugh....poor car) I have put a roll bar, seats, harnesses, and new suspension in car. The engine is stock. I instruct for the BMW club and encourage all coupe drivers to come out to the track with us to have some fun. The Z3 can be twitchy, but it sure is fun to drive on the twisties.