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Product details
This Wilwood Billet Narrow Dynalite Radial is a 4-piston brake caliper with a Type III anodized finish for a nominally 1.00-inch-wide rotor. Its 4.75-inch radial mounting centers and 1.62-inch piston bores must match the brake assembly. Wilwood Engineering was founded by Bill Wood in 1977 and is based in Camarillo, California. The company makes disc brake systems and components, including calipers, rotors, master cylinders, valves, fittings and brake lines for motorsport, street-performance and specialized applications.
Technical Details
- Manufacturer part number: 120-15566-SI
- Component: Wilwood Billet Narrow Dynalite Radial; one caliper
- Pad shape: Wilwood types 7816 / 7216; compound selected separately
- Rotor width: 1.00-inch nominal; 0.94–1.00-inch permitted range
- Rotor diameter range: 11.75–12.19 inches
- Mounting: universal side configuration; Radial; 4.75-inch centers; 0.39-inch mounting holes
- Mount height: 1.24 inches
- Piston arrangement: 4 pistons; 1.62-inch bores; stainless steel
- Hydraulic piston area: 4.12 square inches, as specified by Wilwood
- Fluid inlet: 1/8-27 NPT
- Body and finish: Billet aluminum; Type III anodized
- Dust boots: No
Fitment & Compatibility
Check mounting-center spacing and bracket offset together, then confirm the pad sits fully on the rotor friction surface. Piston area must suit the master cylinder and front-to-rear brake balance.
This listing covers one caliper. Match the brake pads, rotor, hose and mounting arrangement to the complete brake system.
The Billet Narrow Dynalite radial caliper uses four stainless pistons, internal fluid transfer and type 7816 pads. Its 4.75-inch stud spacing differs from the 3.50-inch lug-mount Narrow Dynalite layout.
Ask PMB Performance for help comparing this caliper with your existing assembly. Our over 20 years of experience are most useful when you provide rotor size, mounting details and the current piston configuration.
