All Brake Rotors are a 2-piece design to provide light weight, fade-free performance on the racetrack, effective grip during street racing and drifting, and comfortable, easy-to-use operation under normal driving conditions. Lightweight center sections crafted from 6061-T6 aircraft-grade aluminum give you the benefit of lower rotational mass – making wheels easier to stop, and giving you the instant snap of brake response that’s proper for high performance driving. Because the outer section of the 2-piece rotor can expand and contract independently from the center section, chances of the entire rotor warping due to heat buildup are greatly reduced. And since aluminum is a better conductor of heat, the center sections serve as effective heat sinks by passing heat off faster to the air and to the hub assembly. Combined, these two factors give them a much longer service life than traditional 1-piece rotors. For the serious racetrack driver that’s mindful of avoiding temperature buildup which causes brake fluid boiling and pedal fade, all SuperComp rotors are built with a “full floating” design. Such a layout features an outer section designed to shift slightly as needed. Better self-centering in the caliper lowers brake drag and boosts performance through more even application.