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Product details
Wilwood specifies BP-10 pads for this black AERO4 rear kit with 14-inch SRP drilled-and-slotted rotors. It is a C1500 axle conversion with separate electric parking calipers, not simply a replacement pair of factory rear calipers. The manufacturer is Wilwood Engineering, founded by Bill Wood in 1977 and based in Camarillo, California. It designs and manufactures disc brake components and complete systems, from calipers and brake rotors to valves, master cylinders, fittings and brake lines. Motorsport, street-performance and specialized installations each require those components to be matched to the complete brake system.
Technical Details
- Manufacturer part number: 140-18046-D
- Rotor specification: Spec-37 Iron, SRP Drilled & Slotted, vented; 14.00 x 1.10 inches
- Caliper specification: 4-piston AERO4 in Black Powder Coat; radial mount
- Included service pad compound: BP-10; Stainless pistons
- Caliper body material: Forged aluminum
- Hydraulic inlet: 1/8-27 NPT
- Rotor/hat wheel-stud clearance pattern(s): 5 x 5 in; 5 x 127 mm; match the installed hub/axle pattern
- Housing/flange application: 88-98 C1500
- Required axle offset: 3.25 in; 82.55 mm
- Parking equipment: separate electric calipers, controller and harness 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
Use on the specified 1988–1998 Chevrolet/GMC C1500 rear axle configurations, following every brake-option and spindle qualification in the table. Required dimensions include a 3.25-inch axle offset, 5 x 5-inch lug pattern and 3.09-inch axle register.
The axle flange must not exceed 6.61 inches and needs the specified 0.050-inch x 45-degree chamfer. Confirm clearance around both the service and parking calipers using the manufacturer’s diagram before selecting wheels.
Check the complete application table below, including its model-year splits and configuration notes.
The electric parking brake is for stationary parking, not an emergency-stop brake. Applying it while the vehicle is moving can lock the rear wheels and cause a skid. Follow the wiring and holding-test procedures in the manufacturer’s instructions.
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.
Ask PMB Performance to help confirm the configuration before ordering if the vehicle has modified brakes or running gear. We have over 20 years of experience with parts and fitment; a VIN plus the installed component details gives us the best starting point.
Vehicle Applications
| Years | Make | Model | Model option | Front brakes | Rear brakes | Kit application | Notes |
|---|---|---|---|---|---|---|---|
| 1988-1991 | Chevrolet | C1500 Pickup | 4 x 2 w/ 1.00" Wide Front Rotor | Disc | Drum | Rear Kit | 1 |
| 1988-1991 | Chevrolet | C1500 Pickup | 5 Lug - 4 x 2, w/ 1.25" wide rotor, HD Chassis (F44) | Disc | Drum | Rear Kit | 1 |
| 1988-1998 | Chevrolet | C1500 Pickup | Vehicles using Wilwood Iron ProSpindles | Drop | Drum | Rear Kit | 1 |
| 1988-1991 | GMC | C1500 Pickup | 4 x 2 w/ 1.00" Wide Front Rotor | Disc | Drum | Rear Kit | 1 |
| 1988-1991 | GMC | C1500 Pickup | 5 Lug - 4 x 2, w/ 1.25" wide rotor, HD Chassis (F44) | Disc | Drum | Rear Kit | 1 |
| 1988-1998 | GMC | C1500 Pickup | Vehicles using Wilwood Iron ProSpindles | Drop | Drum | Rear Kit | 1 |
| 1992-1998 | Chevrolet | C1500 Pickup | 5 Lug - 4 x 2 | Disc | Drum | Rear Kit | 1 |
| 1992-1998 | GMC | C1500 Pickup | 5 Lug - 4 x 2 | Disc | Drum | Rear Kit | 1 |
Application Notes
- Line kit included (manufacturer): None
