The STR42 caliper has stainless steel abutments that prevent the steel brake pad backing plate from digging into the aluminum body and sticking. It also has a bridge bolt on the top of the caliper to help make the caliper body stiffer to help assure a solid pedal.
Braided steel brake lines do not swell as much with pressure and thus deliver better brake pedal feel. They are designed to pass the DOT whip test so they are street legal. The adaptor brackets allow you to bolt the radial mount STR42 caliper onto the ear mount stock knuckle.
Stoptech’s Sport brake pads are designed to be totally streetable but can still take the rigors of autocross and light track use. We will be starting off with these pads and hopefully, we will not have to resort to running an aggressive race pad.