HAMANN Z4 M Coupe Renn Taxi German tuner Hamann has developed a new edition of its BMW Z4 M Coupe performance pack with its latest "Renn Taxi" version. Hamann is yet to release official specs for the new model but as these latest images reveal, Hamann has added a roll-cage and Recaro seats indicating that this model is better suited to the race track. The brake package has also been upgraded with perforated discs and larger calipers. HAMANN Z4 M Coupe Renn Taxi coupehamannrenntaxi in Public bookmarkswith autoautomotivecarscoupecustomhamannmrenntaxituningz4