Fitment questions?
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Product details
Four 1.75-inch stainless pistons are fitted to this black Narrow DynaPro caliper. The selected model is a thin-pad radial design for a 0.25-inch rotor width, with no external piston dust boots listed. It is suitable as a matching caliper replacement or as part of a brake conversion whose bracket, rotor and hydraulics have been selected together. Wilwood Engineering was founded by Bill Wood in 1977 and is based in Camarillo, California. The company makes disc brake systems and components for motorsport, street-performance and specialized uses, including calipers, brake rotors, master cylinders, valves, fittings and brake lines; each component must match the requirements of the complete brake system.
Technical Details
- Manufacturer part number: 120-18054-BK
- Caliper type: Narrow Dynapro Radial Mount
- Construction: Billet Aluminium
- Finish: Black 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
Check radial stud spacing, body height and the rotor centerline before installation. In a system using a smaller-bore caliper, the larger piston area changes hydraulic requirements and should not be treated as a cosmetic substitution. The wheel must clear the entire body and hose connection, while the pad must remain fully supported on the rotor friction surface.
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.
