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Product details
This 3.75-inch-mount DPS uses long 1.75-inch pistons for an extra-thin rotor package. The anodized billet housing is specified around a nominal 0.19-inch opening, with two stainless pistons providing hydraulic actuation. It should be selected as the exact long-piston variant rather than a standard-width DynaPro Single. Bill Wood founded Wilwood Engineering in 1977; the company is based in Camarillo, California. Wilwood designs and manufactures disc brake systems and components, from calipers and brake rotors to master cylinders, valves, fittings and brake lines, for motorsport, street-performance and specialized applications; selection depends on the complete brake system.
Technical Details
- Manufacturer part number: 120-9689-LP
- 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: 0.19 inch
- Rotor thickness limits: 0.15–0.25 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
Confirm the rotor’s thickness and friction-track position, then compare the lug mount and bracket height with the drawing. The long-piston arrangement does not make every thin rotor compatible. Check wheel space, fitting position and the hydraulic balance required by the 2.40-square-inch piston area before approving the installation.
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.
