Fitment questions?
Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.
Product details
This black D52 uses the small 1.25-inch piston pair intended for an appropriately balanced rear brake system. Its floating forged aluminum body accepts D52 pads and provides the nominal 1.28-inch rotor width clearance. Bill Wood founded Wilwood Engineering in 1977, and the company is based in Camarillo, California. It designs and manufactures disc brake systems and a component range of calipers, brake rotors, master cylinders, valves, fittings and brake lines serving motorsport, street-performance and specialized installations.
Technical Details
- Manufacturer part number: 120-10938-BK. 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.
- Pistons: 2 stainless steel; bore specification: 1.25 inches. Effective piston area: 2.46 sq in.
- Rotor compatibility: nominal width 1.28 inch; diameter 11.00–12.19 inches. Specified rotor-width limits: 1.19–1.28 inch.
- Hydraulic inlet thread: 7/16-20. Use a fitting with the correct thread and sealing seat.
- Caliper weight: approximately 5.5 lb.
- Compatible brake pad shape: D52; choose the required compound for the brake system.
- Mounting: floating, 7.06-inch centers; universal orientation. Mount holes: 0.69 inch; height: 0.77 inches.
- Body: forged aluminum; finish: Black powder coat.
- Piston dust boots: not fitted.
Fitment & Compatibility
Match the caliper to the actual rear conversion or original mounting configuration. Do not replace a large-bore D52 solely on external appearance; confirm the 2.46-square-inch piston area, rotor dimensions and hose thread.
For a replacement or custom installation, send PMB Performance the brake dimensions and existing component identification. Our 20+ years of experience can help narrow down the correct combination.
