Hamann BMW Z4 M Roadster WallpaperHamann BMW Z4 M Roadster Hamann is synonymous to transforming BMWs into meaner machines and I personally like what they did to the Z4 M. The lowered Hamann Z4 features the usual tuner appointments: a new front bumper with integrated LEDs, side skirts, a spoiler, and rear apron. All standard fare, until you realize how mean they make the Z4 look.Wearing a Hamann
