After months of spy shots and rumor, including leaked photos of the car yesterday, BMW has finally released "official" pictures of its much-anticipated M6 ultra-performance convertible, which debuts at the British Motor Show in July. Featuring 2006's International Engine of the Year - BMW's 5-liter V10 - the big M convertible hustles from 0-100 km/h in just 4.8 seconds.

Mechanically identical to the M6 Coupe, the M6 Convertible includes as standard the seven-speed Sequential M Gearbox (SMG) with BMW's Drivelogic control software, which features no less than 11 different drivetrain management programs. Also included is the Variable M Differential Lock and BMW's Dynamic Stability Control with M Dynamic Mode. Still more driver options are provided in the Electronic Damper Control system, with three user-selectable suspension settings from sport to comfort.

Exterior styling is the same as the M6 Coupe (with the exception of the roof, of course), including aggressive front and rear fascia and the M-trademark quad tailpipes. The M-version is actually slightly longer than the 6-Series convertible, by virtue of the rear fascia with its built-in diffuser.

BMW has made sure that the convertible owner pays very little performance penalty for the privilege of open-air motoring - the company says that the M6 Convertible laps the Nurburgring's Nordschleife "almost as fast" as the M6 Coupe.

UPDATE - all of BMW's official pics after the jump...

[Source: BMW]