The BMW M4 DTM is a thoroughbred racing prototype, 4.725 metres long, 1.950 metres wide and with a base weight of 1,031 kilos. “In terms of performance in the DTM, 100 percent is demanded,” said Zanardi. “You have to go at full throttle and squeeze every ounce of performance out of the car. The race only lasts one hour so you have to treat it in the same way you treat qualifying. And that is exactly what the BMW M4 DTM is designed for. Every detail was developed purposely for racing use.” By comparison, the BMW M8 GTE has a production brother: the BMW 8 Series Coupé. The cars were developed in parallel; BMW M Motorsport engineers worked hand in hand alongside their colleagues from series production. The BMW GT spearhead is 4.980 metres long, 2.050 metres wide and weighs 1,220 kilos. While the BMW M4 DTM has carbon brakes, the brake discs in the BMW M8 GTE are made of steel. However, it was no problem for the BMW M Motorsport engineers to integrate the special lever braking system for Zanardi into the GT racing cars after the BMW M4 DTM. Quite the opposite, being able to test the system planned for the race at Daytona from the outset in the DTM car was a stroke of luck for both Zanardi and the engineers.