Best Maintenance and Modifications for the BMW E90, E92, and E93 M3

Unless you count the incredibly limited availability E46 M3 GTR, the E9X M3 was the only to bear the name and receive a naturally-aspirated, high-revving, small-displacement V8 under the hood. With the introduction of its successor, the F80 M3 and coupe counterpart F82 M4, BMW went back to a straight-six paired with a set of [...]