This stealthy 1M took to the streets of Monaco recently during the Top Marques event.
It definitely did not go unnoticed: when it comes to exhaust crackles and bangs, this might be the most vocal BMW 1M we've ever heard.
See, its AK47 Performance exhaust system does make it sound like machine gun fire from a distance, especially during downshifts.
This is not as mad as the 750 HP G-Power 150i and its howling V10, but this doesn't detract one bit from its drama.
We're not sure what other mods the car might have, we're talking about one seriously fast Bimmer, though, straight out of the box. The 1M is powered by a 3.0-liter turbocharged straight-six good for 340 PS and 500 Nm (368 lb-ft) of torque. It will accelerate from 0 to 100 km/h (62 mph) in 4.9 seconds. Slower than the current M2 Coupe, which succeeded it, but almost as fast as the E92 M3 - and that's no mean feat.