ST40/42-44/35

This is a front, 6-piston, balance-optimized, big brake kit for BMW E9X 335Xi AWD models. It features drilled or slotted 2-piece AeroRotors, 6-piston ST60 forged calipers, forged caliper brackets, sport pads, and DOT-compliant stainless brake lines. This kit is designed to drastically improve braking performance with optimum stopping power and improved brake feel by matching brake components with vehicle weight, master cylinder size, and weight transfer under braking for ideal brake bias and tire contact patch under extreme braking. Excellent thermal management due to larger rotors with enhanced cooling vanes allows consistent and confident braking. Requires 18" wheels for proper fitment.