My car is a BMW 323i from 1996. It's stock all round, except of the 18" wheels I've just fitted. The next steps will be a sports suspension, new brakes and probably an engine kit. It's pretty expensive to get more power from this kind of car, but I found a tuner that knows what to do and has a very good reputation. Kelleners offers a kit for 3000 Euros, containing two camshafts, an upgraded ECU, a new air filter and a new exhaust. It only raises the power from 170 to 208 hp, but the idea of tuning such an engine is not getting the maximum power for me. I rather like an egine that feels good, likes to rev and has a good throttle response.
Obviously, I'm no turbo man, I'd always prefer a good NA engine.
Here's a (not very beautiful) pic of my Bimmer:
http://img80.imageshack.**/img80/8357/wagen23qt.th.jpg
P.S.: also note my signature.
Regards
the Interceptor