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Product details
With 4 pistons and 1.12/1.12-inch bore dimensions, the yellow Wilwood Narrow DynaPro-P brake caliper must be matched to the brake system rather than selected by finish alone. Its 0.95-inch rotor-width specification is separate from rotor diameter. 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: 120-16687-Y
- Component: Narrow Dynapro-P Radial Mount; one individual caliper
- Placement: Universal mounting orientation; verify axle position
- Construction and finish: Billet aluminum; Yellow Powder Coat
- Nominal rotor width: 0.95 inches
- Rotor width range: 0.89–0.99 inches
- Caliper weight reference: 3.9 lb
- Mounting interface: Radial; mounting centers 4.75 inches
- Mounting-hole diameter: 0.39 inches
- Hydraulic inlet thread: 1/8-27 NPT
- 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
Verify the radial mounting interface and the complete rotor-width range shown above. Axle placement is determined by the engineered brake package, not by a generic caliper designation. Account for the 1.12/1.12-inch bores when selecting the master cylinder and front-to-rear balance. Check that the 1/8-27 NPT fitting, flexline and wheel remain clear throughout their operating movement.
Wilwood caliper specifications
A correct caliper choice begins with the complete brake arrangement. PMB Performance has over 20 years of parts and fitment experience; send the mounting geometry and rotor dimensions for help with your selection.
