Scion FR-S 2015, Performance Big Brake Kit by StopTech®. Rotor Construction: 2-Piece. Rotor Style: Slotted. Rotor Type: Vented. Caliper Construction: Fixed. They feature fully forged calipers with patented stiffening bridges, patented 2-piece AeroRotors for optimized cooling, braided stainless steel brake lines, performance brake pads, mounting brackets and all necessary hardware to complete the installation. StopTech Big Brake Kits were the first Balanced Brake Upgrades on the market, offering optimized brake bias to utilize all the traction available from all four tires.