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Wilwood 120-11782-P
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Wilwood FNSL4R 4 Piston Brake Caliper Radial Mount


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Wilwood FNSL4R 4 Piston Brake Caliper Radial Mount $402.71
Out of stock
FNSL4R 4 Piston Brake Caliper
  • Radial Mount
  • 1.12'' / 1.12'' Piston Bore Sizes
  • 1.10'' Brake Disc Width
  • Universal Right/Left Hand Mount
  • Polished Finish
  • Wilwood 120-11782-P Details

    FNSL4R Brake Calipers

    Product Specifications
    Rotor Compatibility
    Rotor Width:1.1''
    Maximum Rotor Width:1.1''
    Minimum Rotor Width:1.0''
    Maximum Rotor Diameter:14''
    Minimum Rotor Diameter:11.75''
    Brake Pad Specifications
    Brake Pad Type 1:7416
    Brake Pad Type 2:N/A
    Brake Pad Type 3:N/A
    Total Pad Area (in/sq):8.2''
    Total Pad Volume (in/sq):3.8''
    Piston Specifications
    Piston 1 Bore:1.12''
    Piston 2 Bore:1.12''
    Piston 3 Bore:N/A
    Piston 4 Bore:N/A
    Total Piston Area (in/sq):1.96''
    Mounting Specifications
    Mount Type:Radial
    Mount Side:Universal Right/Left Hand
    Mount Center:5.98''
    Mount Hole Size:0.39''
    Mount Height:1.45''


    Manufacturer's Part Number:
    Shipping Weight:
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    Internal Fluid Passages - No External Tubes!

    Wilwood's Narrow Superlite 4R (F/BNSL4R) furthers the legendary Superlite caliper series by adding the ease and versatility of the radial mount design. Radial mounting simplifies installation and gives you a couple of adjustment planes for accurate alignment over the disc. Wilwood integrated ''Big Brake'' technology to produce unmatched stopping power in extreme conditions in a wide variety of competition vehicles.

    The four-piston equal bore configuration provides balanced loading for even pad wear in sustained high heat environments. The standard F/BNSL4R calipers feature one-piece stainless steel pistons. Stainless is used for its slow heat transfer properties and high resistance to corrosion. Calipers can be upgraded with Wilwood's exclusive Thermlock pistons. This multi-part piston design creates a highly efficient thermal barrier to further reduce heat transfer from the pads to caliper body, seals, and fluid. Cooler temperatures translate to longer service life and less chance for heat induced pedal fade.

    Click Here for More Thermolock Piston Details

    In addition, each F/BNSL4R is equipped with SRS bridge plates. SRS plates eliminate all bridge wear caused by pad gouging and extend the service life of the caliper. The spring-loaded action of the SRS plates also eliminates pad rattle and dampens the harmonic vibrations that contribute to pad squeal. Two piece bleed screws on each end and internal fluid crossovers prevent damage from track debris and other potential damage sources. High temperature, square faced bore seals provide the largest possible sealing area and controlled piston retraction on release. The full range of Wilwood pad compounds is available to match the brake response and heat range of any competition or sports driving application.

    • Narrow body designed specifically for tight clearance applications
    • Stainless steel pistons are utilized (where noted) for their low heat transfer properties and high resistance to corrosion
    • Thermlock short track pistons are utilized (where noted) for even more protection against heat related seal crystallization and localized fluid boiling
    • Internal fluid passages - no external tubes

    Some parts are not legal for use in California or other states with similar laws / regulations

    Motor Vehicles

    WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.


    WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.

    Electrical Cords

    WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.