Here is some footage of Alpina's B3 GT3 limited edition (of 99), which is based on the Alpina B3 S Bi-Turbo, but with 8 more HP. Re-designing sections of the exhaust system and installing a new enhanced Akrapovic rear silencer increased output in the B3 GT3 by this 8 HP. The direct petrol injected N54 engine delivers a total power output of 408hp at 6000rpm and 540Nm of torque at 4500rpm.
The Alpina B3 GT3 sprints from 0-62mph (0-100kmh) 4.6 seconds and has a top speed of 192mph (309kmh), which the driver, Sport Auto's test drive editor Christian Gebhardt, hits in this video.
See also below for our coverage of the B3 GT3 from the 2012 Geneva auto show.
Limited Edition Alpina B3 GT3