Fitment questions?
Call (855) 786-7101 or text (801) 304-3141.
Real people. Real answers.
Product details
This anodized Wilwood Aero4-DS brake caliper uses a 7.09-inch radial mount and the 1.10-inch rotor-width configuration. It is sold as one caliper, with its piston and mounting specification selected for the complete brake assembly. The Aero4-DS combines four hydraulic pistons with dust wiper seals. Its radial attachment must be aligned to the rotor centerline with the correct bracket; the caliper alone does not establish a wheel or vehicle fit. Founded by Bill Wood in 1977, Wilwood Engineering is based in Camarillo, California. It designs and manufactures disc brake systems and components, including calipers, brake rotors, master cylinders, valves, fittings and brake lines, for motorsport, street-performance and specialized applications. Components must be selected to suit the complete brake system.
Technical Details
- Manufacturer part number: 120-15598
- Component: Aero4-DS Radial Mount; one individual caliper
- Placement: Universal mounting orientation; verify axle position
- Construction and finish: Forged aluminum; Type III Anodize
- Pistons: 4; stainless steel; bore dimensions 1.38/1.38 inches
- Hydraulic piston area: 3.00 square inches
- Dust boots: Yes
- Brake pad shape: 6617; shape number does not specify a friction compound
- 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
- Nominal rotor width: 1.10 inches
- Rotor width range: 1.00–1.10 inches
- Rotor diameter range: 12.19–15.00 inches
- Caliper weight reference: 6.9 lb
Fitment & Compatibility
Match the 7.09-inch radial attachment to the existing bracket, then check caliper centering over the 1.10-inch nominal-width rotor. Axle placement is determined by the engineered brake package, not by a generic caliper designation. The 1/8-27 NPT connection must use the correct fitting and seal. Check the full wheel envelope with the actual bracket and rotor installed.
Wilwood caliper specifications
PMB Performance has over 20 years of experience with parts and brake fitment. Send the installed rotor dimensions, bracket measurements and hydraulic details so we can help compare the component before you order.
