Wilwood Rear Black AERO4 Brakes with 14.25-Inch Drilled/Slotted Rotors for Selected GM 1500 2000–2007

The drilled-and-slotted rotor faces distinguish this black AERO4 rear kit for selected GM 1500 applications. Its 14.25-inch vented rotors and radial four-piston calipers replace the rear service brakes while preserving the original parking-brake mechanism. From its base in Camarillo, California, Wilwood Engineering designs and manufactures disc brake systems and related components. Bill Wood founded the company in 1977. The range spans motorsport, street-performance and specialized applications, including calipers, brake rotors, master cylinders, valves, fittings and brake lines that must be chosen to suit the complete system.

Technical Details

• Manufacturer part number: 140-9838-D
• Calipers: AERO4, 4 pistons, forged aluminum bodies with stainless-steel pistons
• Finish: Black Powder Coat
• Rotors: 14.25 x 1.25 inches, vented iron; SRP Drilled & Slotted faces
• Caliper mounting: radial; hydraulic inlet 1/8-27 NPT
• Included friction: BP20 pads
• Wheel-diameter guide: 18 inches; actual wheel must pass the manufacturer clearance template
• Application: OE rear discs with dual-piston factory calipers and the specified six-lug axle arrangement
• Rotor-hat wheel-stud clearance pattern: 6 x 5.5 inches (6 x 139.7 mm); this does not convert the vehicle’s hub bolt pattern
• Hat stud-hole clearance: approximately 0.63 inch; not a wheel-stud thread specification
• Existing OE hub and parking-brake mechanism retained; mounting hardware included
• Not included: replacement hubs, spindles, master cylinder, booster or brake flexlines
• Position and package: rear service-brake kit; one kit services both sides

Fitment & Compatibility

Brake flexlines are separate. The current kit page references rear hose kits 220-9886 and 220-11196, while installation sheet DS570 references 220-8999 and 220-11196 with year guidance. Confirm the correct rear hose kit with Wilwood for the actual vehicle and brake assembly before ordering the lines.

Use the table below for the exact GM 1500 truck or SUV, year and brake-option combination. Listed applications span selected 2000–2007 vehicles, including restrictions for 2000 new-body models, Denali exclusions and 2007 Classic-body trucks. The OE rear dual-piston disc-brake requirement applies throughout; model name or six-lug wheels alone do not establish fitment. The rotor hat must seat fully against the axle flange, and caliper centering is established with the supplied mounting hardware and shims. Follow the installation sheet for alignment and parking-brake adjustment before checking final wheel clearance.

Wilwood kit specifications · Manufacturer installation instructions and wheel-clearance diagram.

With over 20 years of experience, PMB Performance can help match the brake package to the actual suspension and wheel arrangement. Provide the installed hardware details when fitment is uncertain.

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.

Vehicle Applications

Application Notes

1. For OE rears with dual piston calipers.
2. This is a rear service-brake kit. Front brake-kit flexline references do not identify the hoses required for this rear installation.
3. Line kit included (manufacturer): None
4. Rear flexlines are sold separately. Manufacturer product-page and DS570 hose references differ; confirm the correct rear hose kit for the exact vehicle and brake assembly.
5. Verify the specific model-year and body-style application, OE dual-piston rear discs and rear hose requirements before installation.