Wilwood Rear Superlite Brake Kit for Subaru Impreza/Forester and Saab 9-2X (1999–2008), Black Calipers, GT Slotted Rotors

Wilwood's black four-piston Superlite rear conversion serves the listed Subaru Impreza, Forester and Saab 9-2X applications. The 12.88-inch GT slotted rings bolt to separate aluminum hats and work with the compatible original parking brake. Rear flex lines and BP-10 pads are included; matching the vehicle's original rear disc hardware is essential across the different model-year and trim entries. 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
• Type: Forged Narrow Superlite 4R Big Brake Rear Brake Kit For OE Parking Brake.
• Calipers: Forged Narrow Superlite 4R; 4-piston; Black 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

Check the individual Impreza trim, Forester disc-rear requirement or Saab 9-2X year range before choosing the kit. Inspect the hub register, parking shoes and cables for the original arrangement specified in the installation instructions. Align the rear calipers with the supplied bracket and shim hardware and confirm free rotor rotation. The 17-inch minimum remains conditional on the wheel drawing. Secure the hoses through suspension travel and verify balance with the 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.