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Product details
The black DynaPro lug caliper is the four-piston, 1.75-inch-bore option for a nominal 1.25-inch-wide rotor. It uses a forged aluminum housing and top-supported pads. The published 4.80-square-inch piston area and 5.25-inch mounting pattern need to match the brake package as carefully as the external dimensions. 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: 120-9691
- Caliper type: Dynapro Lug Mount
- Construction: Forged Aluminium
- Finish: Black Powder Coat
- Piston bores: 1.75 / 1.75 inches
- Piston type: Stainless
- Piston count: 4
- Published piston area: 4.80 square inches
- Dust boots: No
- Nominal rotor width: 1.25 inch
- Rotor thickness limits: 1.19–1.27 inches
- Rotor diameter limits: 10.00–13.06 inches
- Mounting style: Lug
- Handedness: Not restricted to one side; correct mounting and bleed orientation required
- Mounting centers: 5.25 inches
- Mounting-hole size: 0.39 inch
- Mount height: 2.10 inch
- Hydraulic inlet thread: 1/8-27 NPT
- Required pad shape: 7812
- Published pad area: 6.36 square inches
- Published pad volume: 2.1 cubic inches
- Manufacturer-listed component weight: 3.8 lb
Fitment & Compatibility
Check the rotor against the 1.19–1.27-inch thickness limits and verify a suitable diameter within the specified envelope. Lug centers alone do not establish rotor offset or the 2.10-inch mount height. Confirm pad sweep, wheel-spoke clearance and the correct hydraulic fitting before using this caliper as a replacement or conversion component.
PMB Performance has over 20 years of experience helping customers with brake and parts fitment. Share the installed component identification and relevant measurements when requesting assistance.
