Wilwood Red DynaPro Single Caliper, 3.75-Inch Lug Pattern with Two 1.38-Inch Pistons

SKU: 120-9690-RD

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Fitment questions?

Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.

Product details

This red DPS is the two-piston, 1.38-inch-bore caliper with 3.75-inch mounting centers. Its billet housing uses the nominal 0.38-inch rotor opening. The exact caliper dimensions should be matched when servicing an existing brake package, particularly because compact DynaPro Single models also exist with narrower lug spacing. 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: 120-9690-RD
  • Caliper type: Dynapro Single
  • Construction: Billet Aluminium
  • Finish: Red Powder Coat
  • Piston bores: 1.38 inches
  • Piston type: Stainless
  • Piston count: 2
  • Published piston area: 1.50 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

Confirm the 3.75-inch bracket interface and 1.92-inch mount height before ordering. The rotor must meet the stated thickness and diameter limits while centering properly between the pads. Check the hydraulic piston area, NPT fitting and surrounding wheel space rather than relying on the finish or abbreviated caliper name.

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.