Fitment questions?
Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.
Product details
The wide-rotor Forged Dynalite-M uses four 1.75-inch stainless pistons in an anodized aluminum body. It belongs to Wilwood’s clearance-oriented Dynalite-M series and is configured for a nominal 1.25-inch rotor width. This is a caliper for an engineered conversion or matching service replacement, with no vehicle model assigned solely from its dimensions. 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: 120-17773
- Caliper type: Forged Dynalite-M
- Construction: Forged 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: 1.25 inch
- Rotor thickness limits: 1.19–1.27 inches
- Rotor diameter limits: 10.00–12.19 inches
- Mounting style: Lug
- Handedness: Not restricted to one side; correct mounting and bleed orientation required
- Mounting centers: 5.25 inches
- Mounting-hole size: 0.39 inch
- Mount height: 2.03 inch
- Hydraulic inlet thread: 1/8-27 NPT
- Required pad shape: 7112
- Published pad area: 6.36 square inches
- Published pad volume: 2.1 cubic inches
- Manufacturer-listed component weight: 3.4 lb
Fitment & Compatibility
Measure rotor thickness against the 1.19–1.27-inch limits and confirm the 5.25-inch mounting centers on the receiving bracket. The nominal opening is not a rotor diameter. A 10.00–12.19-inch-diameter rotor still requires correct radial positioning and a compatible pad footprint, and wheel clearance should be checked using the actual installed package.
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.
