The BMW Z4 M is a unique sport which has unfortunately not as much unbridled passions than its predecessor, the Z3 M. He has an excellent potential for rigorous preparation with a chassis and an engine punchy.RENN Spec-preparer was entrusted by a client that beautiful black, with the specifications of making a self-performing circuit for Sunday outings, while remaining perfectly suited to road use.The first project was the installation of the chassis with KW Coilover Variant 2 cups with adjustable damper, Brembo brakes 6 piston calipers and wheels shod with RSD Advan tires Michelin Pilot Sport Cup. This armada is not harmless because the 6 in-line 3.2-liter is equipped with a compressor kit ESS VT1-445 and full exhaust Barouf. We are told that a power of about 450 horses, which are widely exploited by a short box and a new locking Diffsonline the calibration more robust.