Wilwood Black AERO6 Front Caliper/Rotor Package, Impreza/Legacy/Outback/Forester/WRX/WRX STI (1999–2021), BP-20 Pads and 14-Inch GT Rings

AERO6 six-piston calipers distinguish this black Wilwood Subaru package from the Superlite configurations. It uses GT slotted 14-inch Spec-37 rotor rings, separate aluminum hats and BP-20 pads, with the specified front hoses included. The conversion is selected by the individual model, year and brake-equipment row; its larger rotor and caliper envelope require direct comparison with the installed wheels. Wilwood Engineering was founded by Bill Wood in 1977 and is based in Camarillo, California. The company 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.

Technical Details

• Manufacturer part number: 140-12876
• Type: AERO6 Big Brake Front Brake Kit.
• Calipers: AERO6; 6-piston; Black Powder Coat.
• Piston bore dimensions: 1.62, 1.12, 1.12 inches; stainless pistons. Caliper mounting: radial.
• Included pad compound: BP-20.
• Rotors: 14.00-inch outside diameter × 1.25-inch width; GT Slotted; Spec-37 Iron; Black Electro Coat surface finish.
• Rotor ventilation: 72 curved vanes.
• Rotor hats: Big Brake Hat - Flared Bell; Aluminum; Black E-Coat.
• Wheel bolt circles: 5 x 3.93; 5 x 4.50 inches.
• Included: paired calipers, pads, rotors and mounting hardware, caliper mounting brackets, rotor hats.
• Application-specific hydraulic flex lines included.
• Conditional wheel minimum: 18 inches. Compare the complete wheel-clearance diagram with both barrel and spoke dimensions.

Fitment & Compatibility

Read the rear drum/disc and production-date restrictions for the relevant Impreza, Legacy, Outback or Forester, and distinguish WRX from WRX STI. Compare the original front hub and upright with the kit instructions before assembly. Establish rotor centering and caliper alignment using the required shims. The nominal 18-inch wheel minimum is conditional on barrel and spoke clearance. Verify hose movement through steering travel and confirm the selected front package suits the rear brakes and intended operating use.

Match the individual year, model, submodel and equipment conditions in the fitment table below.

Wilwood installation documents: Installation instructions.

PMB Performance has over 20 years of brake-system experience. Contact us with the vehicle and installed hardware details for help confirming the complete setup.

Manufacturer warning, brake pads only: WARNING: This product can expose you to chemicals including Arsenic, Cadmium, Chromium (Hexavalent compounds), Lead, Nickel, Cobalt and Antimony Trioxide which are known to the State of California to cause cancer or other reproductive harm. For more information go to www.p65warnings.ca.gov.