Fitment questions?
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Product details
A 3.75-inch lug pattern distinguishes this anodized DynaPro Single from the narrower-mount DPS. It contains two opposed 1.75-inch stainless pistons and is configured for a nominal 0.38-inch-wide rotor. The billet body is intended for a brake assembly with the appropriate bracket, pad and hydraulic sizing. 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: 120-9689
- Caliper type: Dynapro Single
- Construction: Billet Aluminium
- Finish: Type III Anodize
- 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: 3.75 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
Measure the bracket centers and verify the 1.92-inch mount height and rotor offset. Check the full pad track on a rotor within the stated diameter and thickness limits. A caliper with 3.25-inch ears is not the same mounting version; ensure the wheel and fitting also clear the installed 3.75-inch body.
With over 20 years of parts experience, PMB Performance can help compare this component with your existing brake assembly. Include its caliper reference and any conversion-kit information.
