Fitment questions?
Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.
Product details
Black powder coat covers the forged Aero4 housing in this Wilwood four-piston caliper. Equal 1.38-inch bores and a nominal 1.10-inch rotor channel make this a specific hydraulic and mechanical configuration within the larger Aero range. Founded in 1977 by Bill Wood, Wilwood Engineering is based in Camarillo, California. It designs and manufactures disc braking systems for motorsport, street-performance and specialized applications, with a component range covering calipers, brake rotors, master cylinders, valves, fittings and brake lines.
Technical Details
- Manufacturer part number: 120-17724-BK. Type: Aero4 Radial Mount caliper.
- Compatible pad profile 6617; confirm thickness and compound for the installation.
- Black Powder Coat finish on a forged aluminum body.
- Nominal rotor width 1.10 inch; compatible width range 1.00–1.10 inch. Rotor diameter specification: 12.19–15.00 inches.
- Hydraulic inlet thread: 1/8-27 NPT. Match the fitting thread and sealing arrangement to the brake hose.
- 4-piston hydraulic layout with 1.38/1.38-inch bores and 3.00 sq in of effective area; piston type: stainless steel.
- 7.09-inch-center radial attachment, universal orientation. 0.45-inch holes; 2.09-inch mounting height.
- Piston dust boots: no.
- Component: one individual hydraulic brake caliper. Select the mating rotor, pads, mounting hardware and line connection to suit the complete brake assembly.
- Caliper component weight: approximately 6.9 lb.
Fitment & Compatibility
Check the 1.00–1.10-inch rotor-width limits and the bracket's offset before choosing the caliper. Confirm mounting height, pad contact area and hose access rather than treating the broad diameter envelope as a direct vehicle-fit claim.
With 20+ years of experience, PMB Performance can help assess the brake hardware. Provide the caliper number, rotor dimensions and bracket measurements when asking about compatibility.
