At the 2012 Essen Motor Show, Manhart Racing reveals an update to the M3 Convertible model. Introduced as the Manhart MH3 V8 R Biturbo, the E92 M3 has its 4.0 liter naturally aspirated V8 engine removed and replaced with an even more powerful unit: the 4.4 liter twin-turbo V8 S63, the very same unit from the X5 M and X6 M models.

Although the S63 unit provides more than adequate power for the M3, the S63 4.4 liter twin-turbo with its 555 horsepower clearly provides an impressive power boost, even without the tuning package offered by  Manhard which brings the total output to 664 horsepower. Maximum torque was also raised to 975 Newton meters. The enormous thrust is handled by the six-speed automatic from the BMW X6 M, while the differential lock on the rear axle helps the power distribution between the two drive wheels.

The top speed is now rated at “over 320 km/h” with most likely a 0 to 100 km/h sprint of 4 seconds (our own assumption). To handle all that power, Manhart fitted the M3 Cabrio with a 4-piston brake system with 396 millimeter discs at the front, at the rear axles 374 mm disk brakes.

The brakes sit behind 20-inch forged aluminum wheels type MHR Concave One Ultra and 255/305 mm wide tires. To grant that optimum contact with the road, the tuner uses a specially tuned KW Clubsport suspension of option 3.

A titanium Akrapovic Evolution exhaust system with four tailpipes 90 millimeters completes the package.

[Source: Bimmertoday]