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Product details
For a rear brake arrangement using the smaller D52 piston area, this red caliper provides two 1.25-inch stainless bores and a nominal 1.04-inch rotor-width channel. Its forged body slides on the compatible GM-pattern mounting bracket. 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: 120-10939-RD. Component: D52 Dual Piston Floater caliper.
- Supply: one brake caliper, not a complete axle brake kit. Match the mating rotor, pads, bracket and connection hardware to the installation.
- Rotor compatibility: nominal width 1.04 inch; diameter 11.00–12.19 inches. Specified rotor-width limits: 0.81–1.04 inch.
- Caliper weight: approximately 5.5 lb.
- Mounting: floating, 7.06-inch centers; universal orientation. Mount holes: 0.69 inch; height: 0.77 inches.
- Piston dust boots: not fitted.
- Hydraulic inlet thread: 7/16-20. Use a fitting with the correct thread and sealing seat.
- Body: forged aluminum; finish: Red powder coat.
- Compatible brake pad shape: D52; choose the required compound for the brake system.
- Pistons: 2 stainless steel; bore specification: 1.25 inches. Effective piston area: 2.46 sq in.
Fitment & Compatibility
Check the exact rotor, D52 pad sweep and 7.06-inch mounting centers. A replacement hose may be necessary where the existing line uses a metric banjo instead of this caliper's 7/16-20 inlet.
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.
