G-Power modified BMW M3 cranks out 635hp

A high-revving, sweet-sounding V8 is a marvelous thing, and BMW's 4.0L V8 in the M3 is a capital example. The tuners at G-Power weren't satisfied with the factory-supplied 414hp (309kW), and decided to strap on a supercharger and boost output to a tire-vaporizing 635hp (473kW). About what you'd expect from the holders of the 'World's fastest street-legal sedan' title. The argument for adding the forced induction was to give the high-strung V8 some more low-end grunt as well as boost overall performance.