Wilwood DynaPro Single Long-Piston Caliper, 1.38-Inch Bores, 3.25-Inch Mount, 0.19-Inch rotor width: compact gray body, upper pad retainers and mounting ears

Wilwood DynaPro Single Long-Piston Caliper, 1.38-Inch Bores, 3.25-Inch Mount, 0.19-Inch rotor width

SKU: 120-9688-LP

$164.82 Sale
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Fitment questions?

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

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Product details

The long-piston DynaPro Single is the extra-thin-rotor version of the 1.38-inch-bore DPS caliper. Two stainless pistons work in an anodized billet housing with 3.25-inch lug centers. Its nominal 0.19-inch rotor opening makes it a distinct configuration from the standard 0.38-inch body. Wilwood Engineering was founded by Bill Wood in 1977 and is based in Camarillo, California. The company makes disc brake systems and components for motorsport, street-performance and specialized uses, including calipers, brake rotors, master cylinders, valves, fittings and brake lines; each component must match the requirements of the complete brake system.

Technical Details

  • Manufacturer part number: 120-9688-LP
  • Caliper type: Dynapro Single
  • Construction: Billet Aluminium
  • Finish: Type III Anodize
  • Piston bores: 1.38 inches
  • Piston type: Stainless
  • Piston count: 2
  • Published piston area: 1.50 square inches
  • Dust boots: No
  • Nominal rotor width: 0.19 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: 3.25 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

Identify the long-piston variant when servicing an existing assembly; lug spacing and bore alone do not establish equivalence. Check rotor thickness within 0.15–0.25 inch, pad position and the bracket’s stand-off. Confirm hydraulic sizing and clearance around the rotor, hub and wheel before installing the replacement.

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.