Wilwood Slotted Rear Brake Kit with Red Calipers for Impreza/Forester/9-2X (1999–2008), 12.88-Inch Rotors

Red four-piston Superlite calipers pair with GT slotted 12.88-inch rotors in this Wilwood rear package. The supported Subaru Impreza, Forester and Saab 9-2X applications retain the compatible original parking-brake mechanism inside the separate rotor hats. Included hoses and pads complete the selected rear hydraulic conversion, rather than establishing fitment for every vehicle sharing these model names. 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: 140-12878-R
• Type: Forged Narrow Superlite 4R Big Brake Rear Brake Kit For OE Parking Brake.
• Calipers: Forged Narrow Superlite 4R; 4-piston; Red Powder Coat.
• Piston bore dimensions: 1.12, 1.12 inches; stainless pistons. Caliper mounting: radial.
• Included pad compound: BP-10.
• Rotors: 12.88-inch outside diameter × 0.81-inch width; GT Slotted; Iron; Black Electro Coat surface finish.
• Rotor ventilation: 48 curved vanes.
• Rotor hats: Parking Brake Hat - Standard; Iron; Black E-Coat.
• Wheel bolt circles: 5 x 3.93 inches.
• Included: paired calipers, pads, rotors and mounting hardware, caliper mounting brackets, rotor hats.
• Application-specific hydraulic flex lines included.
• Conditional wheel minimum: 17 inches. Compare the complete wheel-clearance diagram with both barrel and spoke dimensions.

Fitment & Compatibility

Confirm rear disc equipment and the exact year/trim coverage, then inspect the original hub, parking shoes and cable operation. Compare any replacement upright or axle hardware with the installation geometry. Follow the instructions for rotor assembly, bracket shims and caliper centering. Check the actual wheel against the 17-inch minimum template at its full inner profile. Verify the parking brake releases without drag and review line clearance and hydraulic proportioning with the vehicle's front 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.