While the world’s attention is focus on the recently launched M235i sports coupe , the German tuner Manhart Racing came with a very cool update for the old M135i. The tuner’s package is called MH1 400 and is a clear indication of the engine’s new output: 400 horsepower.
In order to obtain the extra power, the tuner remapped the 3-liter, straight six-cylinder engine’s ECU and installed a new, stainless steel exhaust system with two end pipes measuring 90 mm (3.54 inches). As a result the M135i is now delivering a total of 403 horsepower and 413 pound-feet of torque.
The only problem is that the speed limited was not removed, so the new MH1 400 still goes up to 155 mph.
In order to handle the extra power, the car was equipped with a new, KW Clubsport-coilover suspension system and new, 380 mm (14.96 inches) and 356 mm (14.01 inches) brake discs gripped by eight and four-piston calipers respectively
Click past the jump to read more about the BMW M135i MH1 400 by Manhart Racing.