Fitment questions?
Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.
Product details
The rotor and bracket determine whether this anodized Wilwood Aero4-ST right brake caliper is the correct choice. Its 1.25-inch rotor-width configuration works with the radial mount and 4-piston layout detailed below. Wilwood Engineering, founded in 1977 by Bill Wood, is based in Camarillo, California. The company designs and manufactures disc braking equipment for motorsport, street-performance and specialized use. Calipers, rotors, master cylinders, valves, fittings and brake lines form a range whose individual components must be matched to one another. This Aero4-ST uses four Thermlock insulated pistons with the thick 6620 pad outline. Check the exact unequal bore combination and the 7.09-inch radial mount against the existing installation; the caliper is not selected by color or rotor diameter alone.
Technical Details
- Manufacturer part number: 120-16087
- Component: Aero4 Radial Mount; one individual caliper
- Placement: Right
- Construction and finish: Forged aluminum; Type III Anodize
- Pistons: 4; Thermlock insulated; bore dimensions 1.75/1.50 inches
- Hydraulic piston area: 4.17 square inches
- Dust boots: No
- Brake pad shape: 6620; shape number does not specify a friction compound
- Nominal rotor width: 1.25 inches
- Rotor width range: 1.10–1.28 inches
- Rotor diameter range: 12.19–15.00 inches
- Caliper weight reference: 7.1 lb
- Mounting interface: Radial; mounting centers 7.09 inches
- Mounting-hole diameter: 0.45 inches
- Mount height: 2.09 inches
- Hydraulic inlet thread: 1/8-27 NPT
Fitment & Compatibility
Verify the radial mounting interface and the complete rotor-width range shown above. Use the right-hand caliper and keep the bleed arrangement in the specified orientation. Account for the 1.75/1.50-inch bores when selecting the master cylinder and front-to-rear balance. Check that the 1/8-27 NPT fitting, flexline and wheel remain clear throughout their operating movement.
Wilwood caliper specifications
A correct caliper choice begins with the complete brake arrangement. PMB Performance has over 20 years of parts and fitment experience; send the mounting geometry and rotor dimensions for help with your selection.
