Last year, the tuner mensches at Hartge showed off a BMW 3-Series sedan juiced with the V10 from an M5. This year, with the new coupe all the rage, the company did the same — and unveiled it at the Essen show last week. Indeed, they shoehorned the M5's entire running gear, including 7-speed SMG. The result is 550 hp of M-performance in a lightweight package. And without the flashy paint scheme, it could be the most stealthy Q ship this side of a twin-turbocharged 1978 Dodge Aspen sedan.
[via World Car Fans]
Hartge's V10-Powered BMW 3-Series [internal]