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Product details
This Type III anodized Narrow DynaPro is a four-piston radial brake caliper for a nominal 0.25-inch rotor width. Its 4.75-inch mounting centers and M10 x 1.25 inlet are documented, but the published bore entries do not agree with the listed piston area. The piston configuration therefore needs confirmation before this part is selected for hydraulic sizing. 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: 120-18086
- Caliper type: Narrow Dynapro Radial Mount
- Construction: Billet Aluminium
- Finish: Type III Anodize
- Piston configuration: Four pistons; published bore and piston-area information require confirmation before selection
- Piston type: Stainless
- Piston count: 4
- 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: 4.1 lb
Fitment & Compatibility
Supply the caliper reference and existing brake-package information when checking fitment. Do not calculate master-cylinder or axle balance from the inconsistent bore entries. Confirm the intended piston arrangement directly, then check rotor offset, pad thickness, the 1.61-inch mount height and clearance inside the wheel against the approved drawing.
PMB Performance has over 20 years of experience helping customers with brake and parts fitment. Share the installed component identification and relevant measurements when requesting assistance.
