Now this is a well-executed BMW M3. The Manhart BMW M3 Compressor throws a supercharger into the Bavarian equation, resulting in up to 655 horsepower in the process. That’s on par with the rest of the wild M3s we’ve seen over the past few months, but whereas most tuners just can’t help but deface the clean lines of the BMW, Manhart has left the exterior intact. The result is what could be the ultimate sleeper M3. Outside, the only real changes are those hefty 20-inch wheels. Even with all of that unsprung mass, the car can hit 60 in under 3.5 seconds. Rock and roll.