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Product details
This polished DynaPro Single is a two-piston billet brake caliper for the 3.25-inch lug-mount arrangement. Its equal 1.75-inch bores provide the published 2.40-square-inch piston area. The nominal 0.38-inch rotor opening belongs to the thin-rotor DPS body, with finish selected independently of the working dimensions. Founded in 1977 by Bill Wood, Wilwood Engineering is based in Camarillo, California. Its disc brake systems and components serve motorsport, street-performance and specialized applications. Calipers, brake rotors, master cylinders, valves, fittings and brake lines are among its products, selected according to the complete brake system’s requirements.
Technical Details
- Manufacturer part number: 120-9687-P
- Caliper type: Dynapro Single Polished
- Construction: Billet Aluminium
- Finish: Polish
- Piston bores: 1.75 inches
- Piston type: Stainless
- Piston count: 2
- Published piston area: 2.40 square inches
- Dust boots: No
- Nominal rotor width: 0.38 inch
- Rotor thickness limits: 0.25–0.38 inches
- Rotor diameter limits: 6.00–13.00 inches
- Mounting style: Lug
- Handedness: Not restricted to one side; correct mounting and bleed orientation required
- Mounting centers: 3.25 inches
- Mounting-hole size: 0.39 inch
- Mount height: 1.92 inch
- Hydraulic inlet thread: 1/8-27 NPT
- Required pad shape: 6812
- Published pad area: 3 square inches
- Published pad volume: 1.1 cubic inches
- Manufacturer-listed component weight: 2.3 lb
Fitment & Compatibility
Verify the receiving bracket and 1.92-inch mount height against the full drawing. Check rotor thickness and lateral offset so that both pads remain correctly aligned. Confirm the appropriate rotor diameter, wheel envelope and inlet fitting, then compare the piston area with the master cylinder and intended axle balance.
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.
