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Product details
Red finish and a narrow radial body identify this DynaPro caliper, which is specified for a quarter-inch-wide rotor. Its mounting dimensions are published, while the bore and piston-area information require clarification. This is an individual hydraulic brake component; it should not be substituted into a balanced system until the intended piston sizes are established. Bill Wood founded Wilwood Engineering in 1977; the company is based in Camarillo, California. Wilwood designs and manufactures disc brake systems and components, from calipers and brake rotors to master cylinders, valves, fittings and brake lines, for motorsport, street-performance and specialized applications; selection depends on the complete brake system.
Technical Details
- Manufacturer part number: 120-18086-RD
- Caliper type: Narrow Dynapro Radial Mount
- Construction: Billet Aluminium
- Finish: Red Powder Coat
- 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
Have the current caliper reference and brake conversion details available for the bore confirmation. Check all working dimensions after that point, including the 4.75-inch radial centers and 1.61-inch mount height. Verify pad selection, rotor diameter and wheel clearance together, and use a fitting matched to the M10 x 1.25 inlet.
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.
