About BMW M4
- The BMW M4 is a high-performance version of the BMW 4 Series automobile developed by BMW's motorsport division
- As part of the renumbering that splits the coupé and convertible variants of the 3 Series into the 4 Series.
- the M4 replaced those variants of the BMW M3. Upgrades over the standard BMW 4 Series include an upgraded engine, suspension, exhaust system, brakes and weight reduction
- measures including increased use of carbon fiber, such as on the roof of the car, and the door cards..
- The M4 also had a Competition Sport Lightweight (CSL) version that was 100kg lighter than the standard M4.