The Wilwood ST FSL4R caliper offers advanced braking performance tailored for demanding applications such as dirt and asphalt ovals, off-road racing, rally, and road courses. Designed with differential bore pistons, this caliper ensures optimal pad wear performance by compensating for mechanical loading and temperature variations across the pad face, reducing taper wear during sustained high-temperature braking. The integration of Thermlock? pistons in the ST models significantly enhances heat management by blocking heat transfer from the pads, thereby lowering temperatures within the caliper, fluid, and seals by up to 25% compared to standard stainless steel pistons. This feature is crucial for maintaining consistent braking performance during extended periods of hard braking and in high-stress racing environments. The caliper also boasts a wear-resistant Type III hard anodize finish, which extends its durability and resistance to harsh conditions typically encountered in off-road and competitive racing. Whether used on dirt oval tracks or demanding rally stages, the Wilwood ST FSL4R caliper delivers reliable, high-performance braking with improved heat resistance and pad wear characteristics. Easy to integrate with 1.88-inch or 1.75-inch pistons and compatible with 1.25-inch rotors, this caliper is a robust choice for racing and high-performance automotive applications that demand durability and consistent stopping power.
Features:
- Differential bore pistons: Compensate for mechanical loading and temperature variances to reduce pad taper wear
- Thermlock? pistons: Block heat transfer, reducing caliper, fluid, and seal temperatures by up to 25%
- Type III hard anodize finish: Provides wear resistance and durability in harsh environments
- Compatibility: Designed for 1.88-inch and 1.75-inch pistons with 1.25-inch rotors
- Application versatility: Ideal for off-road, rally, dirt, asphalt ovals, and road course racing
