The unveiling of the BMW Z4 sDrive35iS with its tweaked twin-turbocharged straight six that produces an output of 340 ponies was accompanied by the announcement of the release of a new M-Sports package with aerodynamic, interior and suspension upgrades for the entire Z4 range.The M aerodynamic body styling kit adds a newly designed front bumper and a reworked rear bumper with insert in Anthracite
