You may remember the shape as the same body on the Brabham Racing BT-92 we drove in 2009, with its upgraded V8 engine, wheels and suspension. The parent company recently dropped the Brabham name due to a legal battle and is now known as V-BT Racing.
This time, the new BT-92 has a 4.6-litre V8 producing around 365kW, comfortably eclipsing the regular M3's 309kW.
Factor in lightweight seats, complete carbon-fibre bodywork and other reductions and the weight has been dropped by around 150kg over the standard car.
This means a 0-100km/h time of approximately 4.3 seconds, although further testing may drop this figure even more. It's currently only available in manual form.
For those who want an even more balanced car, V-BT racing is doing a Clubsport version of the 335i Coupe with the same bodykit, but because it's stripped out, it only weighs around 1300kg.
Considering the standard 335i Coupe tips the scales at 1540kg, the Clubsport is said to handle like nothing else.
Using KW suspension and, like its big brother the BT-92, a carbon-fibre wide-body kit, the Clubsport also has a wider track. A new exhaust and remap of the engine sees the power jump from a respectable 225kW to a whopping 295kW all running through the standard BMW DCT transmission.
No performance figures have been released yet for the Clubsport, but we're told it's quicker around a track than the BT-92. Australian distribution is through Ramspeed.