Fitment questions?
Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.
Product details
The 4.75-inch radial attachment distinguishes this Wilwood Narrow DynaPro-P brake caliper. This individual anodized unit is built for the 0.81-inch-wide rotor configuration and requires accurate alignment with the mating rotor and bracket. Wilwood Engineering was founded by Bill Wood in 1977 and is based in Camarillo, California. Its disc brake design and manufacturing work includes master cylinders, valves, fittings and brake lines as well as rotors and calipers. The company serves motorsport, street-performance and specialized applications in which the entire brake system determines component choice. Narrow DynaPro-P uses four 1.12-inch stainless pistons and the 4812 pad outline. The compact radial mount is suited to a measured bracket arrangement. Check rotor diameter and pad sweep against the installation drawing.
Technical Details
- Manufacturer part number: 120-16686
- Component: Narrow Dynapro-P Radial Mount; one individual caliper
- Placement: Universal mounting orientation; verify axle position
- Construction and finish: Billet aluminum; Type III Anodize
- Mounting interface: Radial; mounting centers 4.75 inches
- Mounting-hole diameter: 0.39 inches
- Hydraulic inlet thread: 1/8-27 NPT
- Nominal rotor width: 0.81 inches
- Rotor width range: 0.75–0.86 inches
- Caliper weight reference: 3.8 lb
- Pistons: 4; stainless steel; bore dimensions 1.12/1.12 inches
- Hydraulic piston area: 1.98 square inches
- Dust boots: No
- Brake pad shape: 4812; shape number does not specify a friction compound
Fitment & Compatibility
Choose this component around the existing rotor and bracket, including the 0.81-inch nominal rotor width and 4.75-inch mounting span. Axle placement is determined by the engineered brake package, not by a generic caliper designation. Compare pad support, caliper offset and piston volume with the brake being replaced. Wheel size alone cannot confirm spoke or barrel clearance.
Wilwood caliper specifications
Share the vehicle and the brake system actually installed with PMB Performance before ordering if the configuration is uncertain. We draw on over 20 years of parts and fitment experience when comparing the rotor, mount and caliper.
