If you're a fan of the Manhart tuning company, you'll know about the MH4 550. But now the German firm has made a few additions to its BMW M4 tuning package, making the high-performance coupé a bit more suited to the track.

As before, the MH4 550 uses the Munich-based automaker's S55 twin-turbocharged 3,0-litre straight-six engine, with its outputs hiked from the standard 331 kW and 550 N.m to a more pleasing 405 kW and 820 N.m, thanks chiefly to a remapping of the ECU and the addition of a carbon-fibre air intake system courtesy of Eventuri.

The MH4 550 also gains a catless downpipe exhaust system, apparently improving sound and increasing dynamic pressure. And, to make the coupé more at home on the track, Manhart has now added a KW variant 3 coilover suspension system, adding plenty of stiffness.

But the fresh changes to the exterior are what you'll see first. Here, you'll find gloss-carbon treatment for the front splitter, side-mirror caps and rear diffusor (the latter framing ceramic-coated exhaust tips), along with an impossible-to-miss rear wing (as fitted to the MH2 630 Track Edition). The M Performance wheels are powder-coated in red, while the standard bonnet has been replaced by one of Manhart's carbon items.

The white-and-red exterior colour scheme is echoed inside, where you'll find a roll cage (in place of the rear bench) and Recaro bucket seats in red.