Wilwood Red AERO6 Front Caliper/Rotor Assembly, 14-Inch GT Rings, Impreza/Legacy/Outback/Forester/WRX/WRX STI (1999–2021)

GT slotted 14-inch rotors pair with red AERO6 six-piston calipers in this Subaru front conversion. The 72-vane Spec-37 rings bolt to separate hats, and Wilwood supplies BP-20 pads, front lines and the matching mounting hardware. This selected configuration must correspond to the vehicle's original hub and spindle arrangement, with the individual model/year and equipment entries establishing the supported applications. 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-R
• Type: AERO6 Big Brake Front Brake Kit.
• Calipers: AERO6; 6-piston; Red 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

Compare the specific Subaru application with the car's build date, trim and rear brake equipment. Check any replacement upright or hub before relying on the original vehicle identity. Follow the instructions for rotor registration and caliper positioning, and compare the wheel barrel and spokes with the complete drawing. Do not infer clearance solely from rim diameter. Ensure the lines remain unstrained at full lock, then verify pedal travel and balance with the existing rear brakes.

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.