Product Summary

Universal Fit, Four Caliper Pistons, Ano, Aluminum

    Key Specs

    MFG. Part #120-13264
    Caliper PistonsFour

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    Wilwood 120-13264 Details

    Forged Superlite 4 Radial Mount

    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 FSL4R has been redesigned with internal fluid ports that eliminate the external fluid cross-over tubes. The transfer tube has been replaced with two additional bleed screw assemblies which allow differential bore models to have a left hand and right hand orientation, but no leading or trailing configuration is required. The most noteworthy feature of all the FSL4R caliper models is the exceptional strength and reduced weight of the forging. With assembled weights just at 4.4 pounds, the caliper body design in itself is a product of computer generated solid modeling and stress analysis technology. Each caliper features closed end bridges with a radial transition down to the main body and piston bore housings. The elimination of machined steps and sharp shoulders in this critical area provides a measurable increase in overall body strength and resistance to deflection under load. Every FSL6R body is stress-flow forged from a premium grade aluminum alloy billet.

    Wilwood 120-13264 Specifications

    MFG. Part #120-13264
    Caliper PistonsFour
    Rotor Diameter14 Inch
    Rotor Thickness1.25"
    FinishType III Anodized
    Material TypeAluminum
    Total Piston Area5.18 sq. in.
    Pad Area8.20 sq. in.
    Pad Volume4.90 cu. in.
    Mount TypeRadial
    Piston TypeThermlock
    GTIN Code889545085761