Fitment questions?
Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.
Product details
This Narrow DynaPro is the four-piston, 1.75-inch-bore radial caliper for a nominal 0.38-inch rotor width. The selected body uses a thin-pad layout and Type III anodized finish. Its billet aluminum construction, 4.75-inch mount and NPT connection distinguish the exact caliper from other NDPR rotor-width and inlet versions. Based in Camarillo, California, Wilwood Engineering was founded by Bill Wood in 1977. The manufacturer produces disc brake systems and components for motorsport, street-performance and specialized applications, with a range covering calipers, brake rotors, master cylinders, valves, fittings and brake lines. Individual components are chosen to suit the complete brake system.
Technical Details
- Manufacturer part number: 120-9993
- Caliper type: Narrow Dynapro Radial Mount
- Construction: Billet Aluminium
- Finish: Type III Anodize
- Piston bores: 1.75 / 1.75 inches
- Piston type: Stainless
- Piston count: 4
- Published piston area: 4.80 square inches
- Dust boots: No
- Nominal rotor width: 0.38 inch
- Rotor thickness limits: 0.38–0.38 inches
- Rotor diameter limits: 10.75–12.19 inches
- Mounting style: Radial
- Handedness: Not restricted to one side; correct mounting and bleed orientation required
- Mounting centers: 4.75 inches
- Mounting-hole size: 0.39 inch
- Mount height: 1.61 inch
- Hydraulic inlet thread: 1/8-27 NPT
- Required pad shape: 7812
- Published pad area: 6.36 square inches
- Published pad volume: 2.1 cubic inches
- Manufacturer-listed component weight: 4.1 lb
Fitment & Compatibility
Compare the exact body and pad configuration with the brake package before choosing a replacement. Check 4.75-inch radial spacing, the 1.61-inch mounting height and rotor centerline. The specified rotor thickness is 0.38 inch; confirm the actual rotor and pad sweep, and inspect wheel clearance and hydraulic 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.
