Hawk ER-1 Race Rear Brake Pads - 2008 Chevrolet Corvette 7.0L 427 Limited Edition Z06 (Incl.Shims Pins) - HB659D.570ER 1 has been developed by Hawk Performance for the endurance racing market with a simple goal; offer a higher coefficient of friction than competing endurance pads while maintaining matched or improved lifespan. Years of testing across Americas most prestigious races has resulted in a well rounded compound that offers ideal modulation and pedal communication, with ground breaking friction stability across a thermal range as high as 1,600F. This