Rather than tune the M3’s factory engine, Manhart chose to go big by implanting the twin-turbocharged 4.4-litre V8 and 6-speed automatic transmission from the X6 M SUV, but it didn’t stop there. Remapped ECU software, along with stainless steel downpipes and a titanium Akrapovic Evolution exhaust system with a 200 cpsi sports catalytic converter sees output raised from 408 kW (555 hp) and 680 Nm of torque to a furibund 488 kW (655 hp) and 975 Nm. Sensibly, a differential lock has been fitted and the V-Max has been removed, meaning a top speed of 320 km/h is possible.
Chassis upgrades include a KW Variant 3 coilover suspension kit and the X6 M’s braking system with 396 mm and 374 mm cross-drilled discs, while the original wheels make way for a set of Manhart’s ultralight Concave One forged wheels, measuring 9 and 12×20 inches and wrapped in 255/30 and 305/25 tyres.
[Source: Manhart Racing]