If your 507 hp BMW M6 Convertible is not quite fast enough for your taste then a visit to G-Power might be a good idea. The German tuning house can upgrade your existing 5.0 liter V10 with a Bi-Kompressor system to a breathtaking 635 hp (467 kW).
G-Power works its magic through two ASA T1-12 compressors, one for each cylinder bank and provides the convertible with some amazing stats like a sprint from 0 to 100 km/h in just 4.6 seconds, 0 to 200 km/h in 11.9 seconds and 0 to 300 km/h in 34,5 seconds. Needless to say that the limited top speed (250 km/h) of the production M6 Convertible has been extended to 320 km/h.

Full Article Here: WorldCarFans