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Product details
The red wide-rotor Narrow Superlite 4 uses four 1.75-inch stainless bores and internal fluid crossovers. Its nominal rotor width is 1.25 inches, with 4.80 square inches of effective piston area. Wilwood Engineering was founded by Bill Wood in 1977 and is based in Camarillo, California. It designs and manufactures disc brake systems and components, including calipers, brake rotors, master cylinders, valves, fittings and brake lines for motorsport, street-performance and specialized applications.
Technical Details
- Manufacturer part number: 120-12501-RD. Component: Forged Narrow Superlite 4 Radial Mount caliper.
- Supply: one brake caliper, not a complete axle brake kit. Match the mating rotor, pads, bracket and connection hardware to the installation.
- Compatible brake pad shape: 7416; choose the required compound for the brake system.
- Pistons: 4 stainless steel; bore specification: 1.75 inches. Effective piston area: 4.80 sq in.
- Piston dust boots: not fitted.
- Body: forged aluminum; finish: Red powder coat.
- Caliper weight: approximately 5.0 lb.
- Rotor compatibility: nominal width 1.25 inch; diameter 11.75–14.00 inches. Specified rotor-width limits: 1.19–1.25 inch.
- Hydraulic inlet thread: 1/8-27 NPT. Use a fitting with the correct thread and sealing seat.
- Mounting: radial, 5.98-inch centers; universal orientation. Mount holes: 0.39 inch; height: 1.45 inches.
Fitment & Compatibility
Check rotor centering and 7416 pad contact on the friction surface. The symmetrical arrangement allows either side with correct bleeding orientation, but bracket offset and wheel clearance must still be verified.
PMB Performance has over 20 years of brake-component experience. Send the existing caliper identification, rotor measurements and bracket details for help matching this configuration.
