BMW High Performance Street 5.0 Pads - RearBMW High Performance Street 5. 0 Pads Rear HB621B. 638 HPS 5. 0 For years, engine builders have been pushing motors to the limits of their ability, and at Hawk Performance, we're closer than ever to pushing the ABS Rev Limiter to its limits. High Performance Street 5. 0 pads give your vehicle the greatest stopping power and pedal feel without compromising ABS. HPS 5. 0 is a Ferro Carbon compound that provides advanced braking characteristics to