Wilwood Narrow DynaPro-P Brake Caliper — Red, 4.75-Inch Radial Mount

For a brake assembly requiring the 0.81-inch rotor-width version, this Wilwood Narrow DynaPro-P brake caliper provides the red configuration. Compare its radial mount and piston area with the component being replaced. For motorsport, street-performance and specialized braking applications, Wilwood Engineering designs and manufactures disc brake systems and their individual components. Founded by Bill Wood in 1977 and based in Camarillo, California, Wilwood supplies a range encompassing calipers, rotors, master cylinders, valves, fittings and brake lines, all selected to match the complete system. 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-RD
• Component: Narrow Dynapro-P Radial Mount; one individual caliper
• Placement: Universal mounting orientation; verify axle position
• Construction and finish: Billet aluminum; Red Powder Coat
• 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
• Nominal rotor width: 0.81 inches
• Rotor width range: 0.75–0.86 inches
• Caliper weight reference: 3.8 lb

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.