Whats the best way to make my M3 faster?
Complicated question that is.. A car is really only as fast as its driver. The best way to get more speed, handling, etc out of your car is too improve what typically is the weakest link – the driver! Go to a driving school, do some track time or an autocross, race, etc. Realistically, its very hard to safely push the limits of this car on the street. Learning how to handle the car, how to brake and how to gauge the road will get you going faster than any alleged +10 hp mod a $1000 will buy.
