What does the "6" in M6 stand for? In this scenario, a six-rotor engine.

"Brapping" isn't just a Mazda thing, this BMW can do it too.

The E65 generation of BMW's M6 was a hit and miss in the looks department, not everyone was a fan of the styling, escpecially the grille.

However, one thing car enthusiasts can agree on is the glorious quality of sound produced by its 5.0-litre V10 engine.

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Imagine the flames shooting out of those exhausts. (image credit: Warren Rodger)

Yet, a South African man isn't one of those enthusiasts and to the disgust of BMW fans all around the world, the 378kW V10 has been replaced in favour of a rotary engine.

This isn't your standard 13B or 20B triple rotor, the engine in question is a 3.9-litre SIX-rotor unit that sounds just as good, if not better than the V10.

BRAP, BRAP, BRAP, BRAP. (image credit: Warren Rodger)

If you thought Mazda's Le Mans winning 787B sounded mental, just wait until you hear the exhaust note on this M6.

Probably one of the few cars with an engine bay long enough to house six rotors, the engine was built by a New Zealand company called Kiwi-RE, which is also involved with Mad Mike Motorsport.

Assembling and tuning was performed by AJ Racing Rotaries.

On the dyno, the rotary produced 357kW at 5500rpm which is less than the original engine but seeing as this M6 has been transformed into a race car for the road, there is little doubt it would be quicker than the stock version.

The best part about this car is it could be yours, if you have a spare $117,104.

For that price you're not getting anything in the way of creature comforts, the interior has been completely stripped out and the seats are just pieces of metal with a bit of padding glued on.