Wilwood GT Slotted Front Brake Package, Pontiac G8 (2008–2009), Red AERO6 Calipers and 14.25-Inch Rotors

GT slotted 14.25-inch rotors and red AERO6 calipers define this Wilwood front assembly for the listed Pontiac G8 fitments. The selected six-piston package uses BP-20 pads, separate aluminum rotor hats and application-specific front hoses. It must correspond to the vehicle's compatible original hub and upright configuration, with wheel clearance established before ordering this larger-diameter conversion. 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: 140-12929-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: 14.25-inch outside diameter × 1.25-inch width; GT Slotted; Spec-37 Iron; Plain surface finish.
• Rotor ventilation: 72 curved vanes.
• Rotor hats: Big Brake Hat - Flared Bell; Aluminum; Black E-Coat.
• Wheel bolt circles: 5 x 4.72 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

Identify the exact G8 trim and year, then compare the installed brake equipment with the application and assembly instructions. Inspect hub registration and seat the rotor hats correctly before checking caliper centering. The clearance drawing governs the required spoke and barrel space even on nominal 18-inch wheels. Secure the supplied hoses against interference at full lock and suspension movement. Confirm pedal travel and front-to-rear brake balance once the complete system is assembled.

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.