Upgrade your vehicle's braking performance with the StopTech Big Brake Kit (BBK). This high-performance rear brake system is specifically engineered for 1991-2005 Acura NSX models. It features rigid 4-piston calipers and oversized rotors to provide shorter stopping distances, better modulation, and reduced brake fade. Kit Components and Part Numbers: - Calipers: ST-40 (4-Piston), Red Finish (P/N 31.555.1111/1112.71) - Brake Rotors: Slotted 2-Piece AeroRotors, 328x28mm (P/N 31.555.1111.21/22) - Brake Pads: Stoptech Sport High-Performance Pads (P/N 309.06010) - Brake Lines: Stainless Steel Braided Lines (P/N 950.40502) - Mounting Brackets: Hard-Anodized Billet Aluminum Adapters - Hardware: All necessary high-strength mounting bolts and washers. Note: This kit requires larger aftermarket wheels for proper clearance. Verify wheel fitment before installation.