Wilwood Red Dynalite-M Four-Piston Caliper, 0.75–0.83-Inch Rotor-Width Range / Forged Body

Red powder coat finishes this Wilwood Forged Dynalite-M with four equal 1.38-inch stainless pistons. The nominal 0.81-inch rotor channel and 3.00-square-inch effective area identify the caliper's mechanical and hydraulic specification within the Classic-style range. Wilwood Engineering was founded by Bill Wood in 1977 and is based in Camarillo, California. The company 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: 120-17770-RD. Type: Forged Dynalite-M caliper.
• 4-piston hydraulic layout with 1.38/1.38-inch bores and 3.00 sq in of effective area; piston type: stainless steel.
• Nominal rotor width 0.81 inch; compatible width range 0.75–0.83 inch. Rotor diameter specification: 10.00–12.19 inches.
• 5.25-inch-center lug attachment, universal orientation. 0.39-inch holes; 2.03-inch mounting height.
• Hydraulic inlet thread: 1/8-27 NPT. Match the fitting thread and sealing arrangement to the brake hose.
• Red Powder Coat finish on a forged aluminum body.
• Compatible pad profile 7112; confirm thickness and compound for the installation.
• Component: one individual hydraulic brake caliper. Select the mating rotor, pads, mounting hardware and line connection to suit the complete brake assembly.
• Piston dust boots: no.
• Caliper component weight: approximately 3.4 lb.

Fitment & Compatibility

Use a rotor in the 10.00–12.19-inch diameter envelope with the correct 7112 pad sweep. Verify the bracket aligns the 5.25-inch lug centers and leaves sufficient outboard hat and wheel clearance for the body.

PMB Performance has over 20 years of brake-component experience. Send the existing caliper identification, rotor measurements and mounting details for help comparing this configuration.