Wilwood Rear AERO4 Drum-Parking Brakes for GM Six-Lug 4x4 (1971–1991), Black 14-Inch GT

Black AERO4 calipers and 14-inch GT-slotted rotors form this rear package for the specified GM six-lug axle housing. An included drum-in-hat parking system accompanies the four-piston hydraulic brakes and needs a suitable cable/clevis connection. Bill Wood founded Wilwood Engineering in 1977; the company is based in Camarillo, California. Wilwood designs and manufactures calipers, brake rotors, master cylinders, valves, fittings and brake lines as part of its disc brake systems and component range for motorsport, street-performance and specialized applications. Each component must suit the requirements of the complete brake installation.

Technical Details

• Manufacturer part number: 140-18162
• Service calipers: AERO4; 4 pistons; radial mount; Black Powder Coat
• Brake rotors: 14.00 x 1.10 inches; Spec-37 Iron; GT Slotted; vented construction
• Pads: BP-10; piston material: Stainless
• Caliper body material: Forged aluminum
• Hydraulic inlet: 1/8-27 NPT
• Rotor/hat wheel-stud clearance pattern(s): 6 x 5.5 in; 6 x 139.7 mm; match the installed hub/axle pattern
• Housing/flange application: K5 Blazer / K10
• Required axle offset: 2.46 in; 62.48 mm
• Parking brake: included internal drum/shoe assembly; cable and clevis hardware are not included
• Hydraulic brake hoses: not included; select the correct application-specific lines/fittings
• Wheel clearance: 18-inch wheels may fit; verify the manufacturer’s complete caliper/rotor template for the installed wheel
• Supplied as one kit with mounting hardware; spindles, hubs, master cylinder and booster are not included

Fitment & Compatibility

The 14-inch AERO4 rear kit includes internal parking shoes and requires the listed GM six-lug axle housing at 2.46-inch offset. It applies only to the corresponding year/model entries for K-series, Blazer/K5 Blazer, Jimmy and Suburban vehicles within 1971–1991. A compatible cable arrangement is needed to actuate the parking shoes.

Consult DS1677 for the housing dimensions and rotor-hat installation. Required axle measurements include a 3.55-inch register and 6 x 5.5-inch stud pattern; the flange limit is 7.05 inches with a 0.050-inch x 45-degree chamfer. Obtain the appropriate parking cables/clevis connections and hydraulic hoses separately.

Use the fitment table below to confirm the exact year, model, trim and installation notes.

Manufacturer Resources

• Exact Wilwood kit specifications and wheel-clearance information
• Installation instructions and component list
• Axle-offset measurement worksheet

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.

For fitment help, contact PMB Performance with your VIN and details of any axle, spindle or brake changes. Our team has over 20 years of experience checking parts and fitment, including the dimensions that a model-year search cannot establish.

Vehicle Applications

Application Notes

1. Line kit included (manufacturer): None