Wilwood Forged Narrow Superlite 4R Brake Caliper, Type III Anodized / 1.38-Inch Bore / 0.81-Inch Rotor Width

Match this Type III anodized Wilwood Forged Narrow Superlite 4R to a brake assembly requiring 0.81-inch rotor width and 1.38-inch pistons. The 4-piston caliper uses 5.98-inch radial mounting rather than a vehicle-specific adapter supplied as a kit. Wilwood Engineering’s disc brake range includes calipers, rotors, master cylinders, valves, fittings and brake lines. Bill Wood founded the company in 1977 in California; it is based in Camarillo and serves motorsport, street-performance and specialized brake applications.

The narrow Superlite 4R has four pistons, radial attachment and removable center bridge access to type 7416 pads. Check the specific rotor-width version before ordering another caliper from the same family.

Technical Details

• Manufacturer part number: 120-14055
• Component: Wilwood Forged Narrow Superlite 4R; one caliper
• Body and finish: Forged aluminum; Type III anodized
• Dust boots: No
• Piston arrangement: 4 pistons; 1.38-inch bores; stainless steel
• Hydraulic piston area: 3.00 square inches, as specified by Wilwood
• Mounting: universal side configuration; Radial; 5.98-inch centers; 0.39-inch mounting holes
• Mount height: 1.45 inches
• Fluid inlet: 1/8-27 NPT
• Pad shape: Wilwood type 7416; compound selected separately
• Rotor width: 0.81-inch nominal; 0.75–0.84-inch permitted range
• Rotor diameter range: 11.75–14.00 inches

Fitment & Compatibility

Identify the existing mounting bracket and compare its caliper centerline, hole spacing and radial position. Verify the piston configuration against the hydraulic system specification.

This listing covers one caliper. Match the brake pads, rotor, hose and mounting arrangement to the complete brake system.

With over 20 years of experience, PMB Performance can help compare piston configuration and mounting geometry. Share the existing brake package and measured rotor dimensions before ordering.