The StopTech 6mm Pin Kit (Part Number: 89.000.0004) is a high-performance hardware set designed for Big Brake Kits (BBK) featuring 328mm and smaller rotors. This kit ensures secure pad fitment and optimal caliper functionality by utilizing precision-engineered 6mm pins. It is essential for maintaining consistent braking performance and reducing noise/vibration in high-stress driving conditions. This complete hardware kit includes: 2x 6mm Steel Bridge Pins (Part No. 125.04000) and 2x Spring Clips/Retainers. Ideal for 2-piece rotor systems and StopTech ST-40 or ST-22 caliper series.