Wilwood Rear AERO4 Brake and Parking Shoe Kit, Black with 14-Inch GT Rotors, Chevrolet and GMC C1500 Pickup (1988–1998)

Convert Chevrolet and GMC C1500 Pickup rear drums to black AERO4 calipers and 14-inch GT rotors. Verify five-lug axles and the 3.25-inch offset. The conversion combines the caliper, pad and rotor configuration specified for this axle and mounting arrangement. The manufacturer is Wilwood Engineering, founded by Bill Wood in 1977 and based in Camarillo, California. Wilwood designs and manufactures disc brake systems along with calipers, rotors, master cylinders, valves, fittings and brake lines. Motorsport, street-performance and specialized applications each call for components matched to the overall braking arrangement.

Technical Details

• Piston material: Stainless
• Hydraulic caliper inlet: 1/8-27 NPT
• Rotor dimensions and construction: 14.00 × 1.10 inches; Spec-37 Iron; GT Slotted
• Wheel-size reference: 18 in; the complete wheel-clearance drawing determines fit
• Axle mounting interface: 88-98 C1500; measured axle offset 3.25 in
• Rotor / hat axle-flange drilling: 5 x 5.00 inches; this does not change the retained hub or axle wheel pattern
• Hydraulic flexlines: Not included; supply suitable hoses and fittings separately
• Mounting hardware: Included; verify the installed fastener engagement
• Not included: spindles, wheel hubs, master cylinder or brake booster
• Parking system: Internal shoe parking brake; cable connection must be configured for the vehicle
• Manufacturer part number: 140-17673
• Brake assembly: rear conversion kit; Sold as a kit.
• Calipers: AERO4; 4 pistons per caliper; Black Powder Coat
• Caliper mounting: Radial
• Included pad compound: BP-10

Fitment & Compatibility

Applies to the listed 1988–1998 Chevrolet and GMC C1500 Pickup five-lug, two-wheel-drive axle configurations with a measured 3.25-inch offset. The table below distinguishes the early front-brake/chassis options and later five-lug versions; an Iron ProSpindle entry does not replace the rear-axle checks. Compare axle-flange registration, housing ends and wheel clearance before ordering. The factory parking cable must be modified using the included cable-end adapter kit. Hydraulic flexlines are separate, and the original rubber hoses do not adapt directly to these calipers.

Wilwood product specifications · Wilwood installation and compatibility information · Axle measurement worksheet · Wilwood installation and compatibility information

PMB Performance brings over 20 years of parts and fitment experience to component selection. Share the actual housing flange, axle offset, rotor registration and parking or hydraulic arrangement so we can help check the configuration before ordering.

Manufacturer warning — brake pads only: WARNING: Cancer and Reproductive Harm. www.P65Warnings.ca.gov.