Alpina works closely with BMW and their processes are integrated into BMW's production lines, thus Alpina is recognized by the German Ministry of Transport as an automobile manufacturer, in contrast to other performance specialists which are aftermarket tuners. For instance, the Alpina B7 is produced at the same assembly line in Dingolfing, Germany (BMW Plant Dingolfing), as BMW's own 7 Series. The B7's twin-turbo 4.4-litre V8 is assembled by hand at Alpina's facility in Buchloe, Germany, before being shipped to BMW for installation, and the assembled vehicle is then sent back to Alpina for finishing touches.