The ultimate street braking system; with naturally anodized lightweight components adapted from our racing program. They use the same STR calipers; AeroRotors(R) and AeroHats(R) 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(R) 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. They include forged, lightweight StopTech STR calipers, floating, slotted AeroRotors, stainless steel brake lines, and race engineered caliper brackets. They include forged; lightweight StopTech STR calipers; floating; slotted AeroRotors; stainless steel brake lines; and race engineered caliper brackets. 2014 - 2015 BMW M3, 2015 - 2015 BMW M4