Wilwood Audi Rear GT Brake Package, Red CPB Calipers, 12.19-Inch Rotors and Mechanical Parking Function

This Wilwood CPB kit is a rear hydro-mechanical disc/parking-brake upgrade for Audi A4, S4, RS4 and S5 Rear Brakes. Combination calipers use hydraulic pressure for service braking and a separate internal mechanical lock for parking action. Bill Wood founded Wilwood Engineering in 1977. Based in Camarillo, California, the company designs and manufactures complete disc brake systems and individual calipers, brake rotors, master cylinders, valves, fittings and brake lines for motorsport, street-performance and specialized installations.

Technical Details

• Manufacturer part number: 140-14591-R.
• Match the CPB caliper architecture when selecting related components: radial attachment, one steel piston, aluminum/steel body and Red Powder Coat finish.
• Use a compatible hose adapter for the caliper's M 10 x 1.00 inlet.
• Pad selection is BP-10; piston-bore measurements are 1.62 inches. Confirm those values for any system changes.
• For rotor replacement, match all four specifications: 12.19 in; 309.63 mm outside diameter, 0.81 in; 20.57 mm thickness, Spec-37 Iron and the gt slotted surface. Rotor construction: vented.
• For the rotor-to-hub interface, the kit supplies separate aluminum hats finished in Black E-Coat.
• Attachment dimensions to confirm are 5 x 4.41 in; 5 x 112.01 mm for the wheel mounting pattern(s) and 0.590 in; 14.99 mm for the nominal hat stud-hole clearance diameter.
• The kit does not supply replacement hubs; confirm the dimensions of those already installed.
• Included installation parts cover the kit mounting hardware, with spindles, brake booster and master cylinder excluded.
• The braided flexline package is 220-14597, supplied in a listed 12.00 in length. Inspect end connections and routing before use.
• Before ordering wheels, check the full inside profile against the drawing and the published 17 in; 431.8 mm minimum diameter.
• One brake kit is supplied for the specified application and axle position.

Fitment & Compatibility

Match the exact Audi application rows, including 2002 A4/S4 eighth-digit VIN E and the listed RS4 body styles/2008 S5. Reuse and reroute the OE parking cables to the new caliper levers, then adjust them as DS-1235 directs. Open the hose chassis-bracket hole to 0.625 inch; do not assume later electronic-parking applications fit. Models covered: A4, S4, RS4 and S5. Use the complete application table at the bottom for the precise year, submodel, brake option and note attached to each row.

For fitment assistance, provide PMB Performance with the existing brake configuration and measured mounting/wheel details. Our 20+ years of parts experience support checking the complete assembly rather than relying only on a model name.

Manufacturer Warning

Applicable to the included brake pads only: Wilwood warns of exposure to arsenic, cadmium, hexavalent chromium compounds, lead, nickel, cobalt and antimony trioxide, chemicals known to California to cause cancer or reproductive harm. More information: www.P65Warnings.ca.gov.