Raybestos ST45 brake pads for AP Racing CP9660 calipers are a high-performance track and race compound designed for heavy, fast cars that need stable braking torque, strong heat resistance and reliable pad life. Designed for the CP9660 / CP3905 pad profile, these pads use an 18mm thickness and 54mm pad depth, making them suitable for AP Racing Pro5000R CP9660 six-piston calipers.
ST45 is aimed at demanding road-race, club-race, HPDE and open-track use. Compared with Raybestos ST43, ST45 offers a higher initial friction level up to around 900°F, with an effective upper temperature range of around 1300°F. This makes it a strong choice for cars that generate higher brake temperatures or need more stopping force than ST43 can provide.
Raybestos positions ST45 as a stable mid-to-high friction compound with good pad wear and user-friendly behaviour, making it suitable for drivers who want strong braking performance without moving to an overly aggressive or difficult-to-modulate pad.
