As part of our BMW M4 project the company Snipptec was invited by AC Schnitzer. This should prove the BMW M4 and in several planned trials show what they can. After an input drive in its original state the first components were installed on the tires, wheels and chassis. Quick, there was a marked change in vehicle dynamics in curves. The stability and controllability of the vehicle increased considerably. Also, the higher grip in the corners was very noticeable. Following even the engine has been modified. Exceptional was the increase in torque in the lower and especially in the upper speed range. The result showed afterwards in the test with the magazine Sport Auto on the small track in Hockenheim. Here you could drive a new BMW tuner AC Schnitzer lap record. With a new lap record could clearly distance itself from the competition in this test.