Wilwood Caliper-Forged Superlite FSL4R/ST Aluminum 1.88/1.75in Pistons .81in Disc Ano - 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.

Note for Pistons, Rings, Rotors, Rods and engine internals

Unless otherwise specified, some brands supply brake rotors, pistons, strut mounts, rods and rings separately. In some cases, titles may indicate plural, or 'set' - eg the term “ring set” often refers to the rings for a single piston only. If you’re unsure about what’s included with this product, please contact our team for clarification.

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Reference Information

Brake Caliper, Forged Superlite 4 Radial Mount, 4-Piston, Aluminum, Gray Anodized, 0.81 in. Rotor, Front or Rear, Each

Engineered to deliver the pad wear performance advantages of differential bore pistons, Wilwood forged Superlite 4 radial mount calipers also provide ultimate heat protection in the ST models. The differential piston bores compensate for leading-edge mechanical loading and temperature variances across the pad face. The Thermlock pistons in the ST models block heat transfer in the pads and reduce temperatures in the caliper, fluid, and seals by up to 25 percent over standard stainless steel pistons.

Additional information:
• Billet aluminum caliper material
• Black anodized or nickel plated finish
• Four-piston calipers
• Various rotor thickness and piston diameters available
• Calipers include Wilwood logo