Wilwood Forged Superlite FSL4R/ST Aluminum Caliper with Thermlock Pistons for High-Performance Braking

Description

The Wilwood Forged Superlite FSL4R/ST aluminum caliper is engineered for demanding high-performance applications, offering advanced features for superior braking performance. Equipped with differential bore pistons, these calipers effectively compensate for mechanical load variations and temperature differences across the brake pad face, which helps minimize pad taper wear during extended high-temperature braking scenarios. The inclusion of Thermlock® pistons in the ST models provides additional heat management, reducing caliper, fluid, and seal temperatures by up to 25% compared to standard stainless steel pistons, thereby enhancing durability and reliability under strenuous conditions.
The calipers feature a wear-resistant Type III hard anodize finish, ensuring longevity and resistance to harsh environments typical of off-road, rally, dirt oval racing, and road course applications. Designed with precision and durability in mind, these calipers are suitable for sustained hard braking, making them an ideal choice for race cars and high-performance vehicles that require consistent, fade-resistant stopping power.
This model is built with a compact yet robust aluminum forging, providing strength while keeping weight to a minimum. The part number 120-13828 and a piston size of 1.88 inches and 1.75 inches ensure compatibility with a wide range of braking systems. With a sleek design and high-quality construction, Wilwood’s FSL4R/ST calipers deliver reliable braking performance and heat management, ensuring your vehicle maintains optimal stopping power even during intense driving conditions. These calipers are a perfect upgrade for enthusiasts and professional racers seeking durable, high-performance brake components that withstand the rigors of competitive and off-road driving environments.

Features:

• Differential bore pistons: Compensate for load and temperature variances to reduce pad taper wear

• Thermlock® pistons: Block heat transfer, reducing caliper and fluid temperatures by up to 25%

• Hard anodize finish: Provides wear resistance and longevity in demanding conditions

• Aluminum forging: Offers strength combined with lightweight construction

• Designed for high-performance applications: Suitable for dirt, asphalt ovals, rally, off-road, and road courses