Fitment questions?
Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.
Product details
For a brake system using a 0.81-inch-wide rotor, this Type III anodized Wilwood Narrow Dynapro Radial provides 4 pistons with 1.12-inch bores. The caliper attaches on 4.75-inch radial centers. Founded in 1977 by Bill Wood, Camarillo, California-based Wilwood Engineering manufactures disc brake components for motorsport, street-performance and specialized uses. Its range covers calipers, rotors, master cylinders, valves, fittings and brake lines.
This narrow four-piston Dynapro uses a 4.75-inch radial pattern and type 7812 pads. The compact body must still clear the wheel and rotor hat, with the bracket locating the pad sweep correctly on the rotor.
Technical Details
- Manufacturer part number: 120-14091
- Component: Wilwood Narrow Dynapro Radial; one caliper
- Piston arrangement: 4 pistons; 1.12-inch bores; stainless steel
- Hydraulic piston area: 1.98 square inches, as specified by Wilwood
- Pad shape: Wilwood type 7812; compound selected separately
- Mounting: universal side configuration; Radial; 4.75-inch centers; 0.39-inch mounting holes
- Mount height: 1.61 inches
- Rotor width: 0.81-inch nominal; 0.75–0.86-inch permitted range
- Rotor diameter range: 11.75–12.88 inches
- Fluid inlet: 1/8-27 NPT
- Dust boots: No
- Body and finish: Billet aluminum; Type III anodized
Fitment & Compatibility
Measure rotor width before comparing calipers. Verify the mount height, rotor centerline and available wheel space; a common piston count does not establish interchangeability.
This listing covers one caliper. Match the brake pads, rotor, hose and mounting arrangement to the complete brake system.
With over 20 years of experience, PMB Performance can help compare piston configuration and mounting geometry. Share the existing brake package and measured rotor dimensions before ordering.
