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Product details
The wider-rotor Powerlite shown here uses four 1.00-inch stainless pistons in an anodized forged body. Its 0.79–0.86-inch rotor thickness envelope distinguishes it from the narrow solid-rotor variant. This small-bore caliper supplies a 1.58-square-inch published piston area and mounts through the radial format. Based in Camarillo, California, Wilwood Engineering was founded by Bill Wood in 1977. The manufacturer produces disc brake systems and components for motorsport, street-performance and specialized applications, with a range covering calipers, brake rotors, master cylinders, valves, fittings and brake lines. Individual components are chosen to suit the complete brake system.
Technical Details
- Manufacturer part number: 120-8727
- Caliper type: Powerlite Radial Mount
- Construction: Forged Aluminium
- Finish: Type III Anodize
- Piston bores: 1.00 / 1.00 inches
- Piston type: Stainless
- Piston count: 4
- Published piston area: 1.58 square inches
- Dust boots: No
- Nominal rotor width: 0.86 inch
- Rotor thickness limits: 0.79–0.86 inches
- Rotor diameter limits: 9.45–11.00 inches
- Mounting style: Radial
- Handedness: Not restricted to one side; correct mounting and bleed orientation required
- Mounting centers: 5.08 inches
- Mounting-hole size: 0.40 inch
- Mount height: 1.56 inch
- Hydraulic inlet thread: 1/8-27 NPT
- Required pad shape: 7912
- Published pad area: 5 square inches
- Published pad volume: 1.8 cubic inches
- Manufacturer-listed component weight: 2.8 lb
Fitment & Compatibility
Check the 5.08-inch centers, 1.56-inch mount height and rotor offset on the actual bracket. Verify diameter and pad sweep with the complete assembly drawing, then inspect wheel-spoke clearance. A change in piston size should be evaluated with the master cylinder and opposite axle rather than treated as a finish choice.
For help identifying the correct brake component, provide the caliper markings and installation dimensions. PMB Performance has over 20 years of experience with parts and brake-system details.
