The ultimate street braking system with naturally anodized lightweight components adapted from our racing program. They use the same STR calipers AeroRotors and AeroHats as the Trophy Race BBKs but add silicone dust boots to extend service intervals and anti - rattle rotor mounting hardware for quieter street operation. They also include StopTech Street Performance brake pads for high performance street and occasional track use and StopTech Stainless Steel Lines. Any StopTech BBK can be ordered as a Trophy Sport Kit by specifying it on the order form.