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Product details
Red finish, 4.75-inch radial mounting and four 1.75-inch bores identify this Narrow DynaPro brake caliper. Its quarter-inch rotor opening belongs to a specific thin-pad package; a similar-looking DynaPro intended for a thicker rotor is not an equivalent replacement. The billet aluminum housing has an M10 x 1.25 inlet. Founded in 1977 by Bill Wood, Wilwood Engineering is based in Camarillo, California. Its disc brake systems and components serve motorsport, street-performance and specialized applications. Calipers, brake rotors, master cylinders, valves, fittings and brake lines are among its products, selected according to the complete brake system’s requirements.
Technical Details
- Manufacturer part number: 120-18054-RD
- Caliper type: Narrow Dynapro Radial Mount
- Construction: Billet Aluminium
- Finish: Red Powder Coat
- Piston bores: 1.75 / 1.75 inches
- Piston type: Stainless
- Piston count: 4
- Published piston area: 4.80 square inches
- Dust boots: No
- Nominal rotor width: 0.25 inch
- Rotor thickness limits: 0.25–0.25 inches
- Rotor diameter limits: 10.75–12.19 inches
- Mounting style: Radial
- Handedness: Not restricted to one side; correct mounting and bleed orientation required
- Mounting centers: 4.75 inches
- Mounting-hole size: 0.39 inch
- Mount height: 1.61 inch
- Hydraulic inlet thread: M10 x 1.25
- Required pad shape: 7812
- Published pad area: 6.36 square inches
- Published pad volume: 2.1 cubic inches
- Manufacturer-listed component weight: 3.6 lb
Fitment & Compatibility
Use the actual conversion drawing to establish bracket height and lateral alignment. Rotor diameters from 10.75 to 12.19 inches are listed for this part, but wheel clearance and pad overlap remain installation checks. Preserve a suitable bleed-screw position and evaluate the piston area with the master cylinder and the other axle’s brakes.
For help identifying the correct brake component, provide the caliper markings and installation dimensions. PMB Performance has over 20 years of experience with parts and brake-system details.
