Wilwood Red Four-Piston Superlite Internal Caliper, 0.81-Inch Rotor Width / 3.00-Sq-In Area

Red powder coat finishes this four-piston Superlite Internal caliper. Equal 1.38-inch bores supply a 3.00-square-inch effective area in a body configured around a nominal 0.81-inch rotor width. Wilwood Engineering is a Camarillo, California-based designer and manufacturer of disc brake systems, founded by Bill Wood in 1977. Calipers, brake rotors, master cylinders, valves, fittings and brake lines form its range for motorsport, street-performance and specialized applications.

Technical Details

• Manufacturer part number: 120-11128-RD. Component: Forged Superlite Internal caliper.
• Supply: one brake caliper, not a complete axle brake kit. Match the mating rotor, pads, bracket and connection hardware to the installation.
• Brake pad profile 7420; select friction material for the actual operating conditions.
• Red powder coat finish on a forged aluminum caliper body.
• Caliper weight: approximately 5.2 lb.
• The rotor channel is specified for 0.81-inch nominal width. Rotor outside diameter: 11.75 to 13.06 inches. Specified rotor-width limits: 0.75–0.84 inch.
• Piston dust boots: not fitted.
• 4 stainless steel pistons with 1.38-inch bore diameter. The specified effective area is 3.00 sq in.
• 3.50-inch lug mounting pattern, universal; mounting height 2.85 inches and hole size 0.45 inch.
• Hydraulic inlet thread: 1/8-27 NPT. Use a fitting with the correct thread and sealing seat.

Fitment & Compatibility

Confirm the rotor's diameter, width and lateral placement together. The 3.50-inch lugs and 7420 pad family identify the mounting format, but do not establish a direct vehicle application.

PMB Performance has worked with brake components for over 20 years. Share the required piston sizing, rotor measurements and bracket drawing for help checking the match.