It`s an Albrex supercharger, and the car was tuned up by Albrex in Wörgl(Austria). The car has a longer gearbox ( Alpina B10 Biturbo) and a external justable injection. There had been some races yet and the only thing I can say is that I ve never lost one The car was new coloured and the leather looks better than new. But the best thing is the sound of the charger, the car sounds like an airplane.