TROPHY SPORT BIG BRAKE KIT 2 PIECE

The StopTech Rear 345 ST40 Big Brake Kit for E9X 325i/328i is designed to drastically improve braking performance on and off the race track. This system features drilled or slotted 2-piece Aerorotors, 4-piston ST40 forged calipers, forged caliper brackets, Sport pads, and DOT-compliant stainless steel brake lines. StopTech's patented Balanced Brake Upgrade® ensures optimal brake bias and tire contact under extreme braking. The Aerorotors feature a directional vaning pattern for enhanced cooling, leading to more consistent performance and longer pad life. The ST40 calipers are made from forged aluminum, offering superior stiffness and rigidity for optimum brake pad application and quicker response. The kit includes 309 Sport pads, which provide strong initial bite and consistent performance across a wide temperature range, suitable for aggressive street use, autocross, or light track duty. 18" wheels are required for fitment.