www.m5board.com Porsche Carrera GT vs Hans Dahlbäck Porsche 911 Gt2 (997) with changed turbos, exhaust manifolds and more. It is a race where in the 1st race the HD 911 GT2 shifts wrong at 4th gear and on the rerace the Porsche Carrera GT hits the revlimiter at the start. Overall they seem quite evenly matched with an edge to the Porsche Carrera GT at speeds over 270 km/h (170 mph).