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Product details
The right FSLI4 uses a differential 1.88/1.75-inch piston arrangement to manage pad loading. This anodized four-piston version has a nominal 0.81-inch rotor-width channel and a 5.18-square-inch effective area. With a range spanning calipers, brake rotors, master cylinders, valves, fittings and brake lines, Wilwood Engineering designs and manufactures complete disc braking systems and their components. Bill Wood founded the Camarillo, California-based company in 1977 for a market now covering motorsport, street-performance and specialized applications.
Technical Details
- Manufacturer part number: 120-11137. Component: Forged Superlite Internal 4 caliper.
- Supply: one brake caliper, not a complete axle brake kit. Match the mating rotor, pads, bracket and connection hardware to the installation.
- Caliper weight: approximately 5.2 lb.
- Mounting: lug, 3.50-inch centers; right hand orientation. Mount holes: 0.45 inch; height: 2.85 inches.
- Pistons: 4 stainless steel; bore specification: 1.88/1.75 inches. Effective piston area: 5.18 sq in.
- Compatible brake pad shape: 7420; choose the required compound for the brake system.
- Rotor compatibility: nominal width 0.81 inch; diameter 11.75–13.06 inches. Specified rotor-width limits: 0.75–0.84 inch.
- Hydraulic inlet thread: 1/8-27 NPT. Use a fitting with the correct thread and sealing seat.
- Body: forged aluminum; finish: Type III anodize.
- Piston dust boots: not fitted.
Fitment & Compatibility
Keep the right-hand differential-bore orientation when selecting the caliper. Internal crossovers permit leading or trailing placement, but rotor offset and 7420 pad sweep still need to match the bracket.
PMB Performance brings more than 20 years of experience to brake-part selection. Include the existing caliper, rotor and mounting details when requesting help with this assembly.
