Wilwood Forged Superlite FSL4R/ST Aluminum Brake Caliper with Thermlock Pistons – Right

FSL4R/ST calipers provide the pad wear performance advantages of differential bore pistons with the option for ultimate heat protection using Thermlock® pistons in the ST models. Differential piston bores compensate for leading-edge mechanical loading and temperature variances across the pad face to reduce pad taper wear in sustained high temperature applications. Thermlock® pistons in the ST models block heat transfer from the pads and reduce temperatures in the caliper, fluid, and seals by up to 25% over standard stainless steel pistons. Featuring a wear resistant Type III hard anodize finish, these are the go-to calipers for all types sustained hard braking on dirt and asphalt ovals and a wide range of off-road, rally and road course applications.

The Wilwood Forged Superlite FSL4R/ST aluminum brake caliper offers high-performance braking suitable for demanding racing and off-road applications. Featuring a differential bore piston design, this caliper effectively compensates for mechanical loading and temperature variations across the pad face, which helps to minimize pad taper wear during extended high-temperature braking. The FSL4R/ST model includes Thermlock® pistons, which significantly reduce heat transfer from the pads to the caliper, fluid, and seals, lowering temperatures by up to 25% compared to standard stainless steel pistons, thereby enhancing durability and performance in sustained hard braking scenarios.
The caliper is finished with a wear-resistant Type III hard anodize coating, ensuring longevity and resistance to harsh conditions encountered on dirt tracks, asphalt ovals, rally courses, and off-road terrains. Its forged aluminum construction provides a lightweight yet robust structure, contributing to improved vehicle handling and braking response. Designed for right-side installation, this caliper is ideal for high-performance vehicles requiring reliable, consistent braking under intense conditions.
Installation is straightforward with compatibility for a 1.88-inch or 1.75-inch piston configuration, and the caliper’s dimensions are optimized for various racing and off-road setups. The FSL4R/ST caliper is a versatile choice for drivers who demand superior heat management, reduced wear, and durable construction in their braking systems, making it an essential component for serious racing, rally, or off-road applications.

Features:

• Differential bore pistons: Enhance pad wear performance by compensating for mechanical and temperature variances

• Thermlock® pistons: Reduce heat transfer from pads, lowering caliper, fluid, and seal temperatures by up to 25%

• Hard anodized finish: Provides wear resistance and durability in harsh environments

• Forged aluminum construction: Offers a lightweight yet strong caliper design for optimal performance

• Designed for high-stress racing and off-road applications: Suitable for dirt, asphalt ovals, rally, and off-road use

Air Freight Prohibited: false
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Part Type: automotive
Epa: N/A
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Regular Stock: false
Units Per Sku: 1