Fitment questions?
Call (855) 786-7101 or text (801) 304-3141.
Real people. Real answers.
Product details
Black powder coating finishes this Narrow DynaPro hydraulic caliper. Four equal 1.62-inch bores provide the specified piston area, and the thin rotor opening suits the dedicated quarter-inch-width arrangement. A radial bracket locates the body over the rotor; the caliper is one component of that assembly and does not define a vehicle application on its own. 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: 120-17870-BK
- Caliper type: Narrow Dynapro Radial Mount
- Construction: Billet Aluminium
- Finish: Black Powder Coat
- Piston bores: 1.62 / 1.62 inches
- Piston type: Stainless
- Piston count: 4
- Published piston area: 4.12 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: 4.1 lb
Fitment & Compatibility
The receiving mount needs 4.75-inch centers and the correct stand-off from the rotor. Compare the full body and pad dimensions with the wheel and hub, especially if replacing a different narrow caliper. Use an M10 x 1.25 inlet fitting appropriate for the system, and check bleed-screw orientation after positioning the caliper.
PMB Performance brings over 20 years of brake and parts experience to selection questions. Send the existing caliper reference and brake-package details for help checking compatibility.
