Prior Design recently reveiled its plans for PD-M1, or M-inspired bodykits for the BMW 3 series.
The bodykit will include an aggressive front bumper with the same vent styles as the M3. The side skirt seems to be left alone for the most part, only slightly revised. The package also comes with a custom rear bumper with its own diffuser. These are all made out of "Dura-Flex" which is a very high quality material, great for constructing and is easily paintable.
Prior Design also offers KW coilover suspension and 20-inch wheels which look absolutely great with the M-inspired bodykits.