Description
Wilwood AERO4 RearTruck Kit 14.25in 1999-2010 GM 1500-SUV 1 Piston OE Caliper
AERO4 Big Brake rear axle kits replace the factory disc brakes and use the OE parking brake assembly as a compliment to front big brake upgrades on late model trucks and SUV’s. High capacity braking from the AERO4 calipers, BP-10 compound pads, and oversized rotors are matched to the OE master cylinder output, ABS function, and individual vehicle bias requirements. Enhanced brake performance, increased durability, and high-tech style compliment big wheel, tire, and suspension upgrades on customized vehicles, tow rigs, and all others with increased brake requirements from high GVW.
Data: v2 - Desc: v4.2 - Upd: 2026-11-08 08:54:01
Features
Note for Pistons, Rings, Rotors, Rods and engine internals
Unless otherwise specified, some brands supply brake rotors, pistons, strut mounts, rods and rings separately. In some cases, titles may indicate plural, or 'set' - eg the term “ring set” often refers to the rings for a single piston only. If you’re unsure about what’s included with this product, please contact our team for clarification.
(keyword: piston)Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.
Specifications
Reference Information
| Reference Data (Provide these details to our support team) | |
|---|---|
| Brand Name/s | Wilwood, Wilwood Disc Brakes |
| StreetFX SKU | wil140-9407 |
| SFX Item ID | 4404503 |
| Accounting SKU | wil-140-9407 |
| Manufacturer SKU | 140-9407 |
| Manufacturer UPC | 889545031843 |
| Alternative References | WIL-140-9407 |
Disc Brakes, W4A, Rear, Slotted Rotors, 4-Piston Black Calipers, Chevy, GMC, Kit
These Wilwood W4A rear disc brake kits are designed to replace the factory disc brakes and still use the OEM parking brake assembly. They feature Wilwood's W4AR brake calipers, vented rotors, and BP-10 compound brake pads. Stop your ride quicker than ever before with one of these Wilwood W4A rear disc brake kits.
| Product Attributes | |
|---|---|
| UPC | 889545031843 |
| Brand | Wilwood Disc Brakes |
| Notes | Fits 6 lug applications. Replaces models with single rear piston calipers. |
| Position | Rear |
| Quantity | Sold as a kit. |
| Part Type | Disc Brake Kits |
| Product Line | Wilwood W4A Rear Disc Brake Kits |
| Rear Rotor Style | Slotted surface |
| Rear Caliper Color | Black |
| Parking Brake Style | Internal drum |
| Rear Rotor Diameter | 14.25 in./361.95mm |
| Rear Rotor Included | Yes |
| Brake Hoses Included | No |
| Front Rotor Included | No |
| Rear Caliper Included | Yes |
| Rear Caliper Material | Forged billet aluminum |
| Brake Booster Included | No |
| Front Caliper Included | No |
| Front Spindles Included | No |
| Parking Brake Provision | Yes |
| Rear Rotor Construction | Vented |
| Master Cylinder Included | No |
| Manufacturer's Part Number | 140-9407 |
| Rear Rotor Thickness (in.) | 1.25 |
| Rear Caliper Piston Quantity | Four |
| Brake Rotor Bolt Pattern (mm) | 6 x 139.70mm |
| Brake Rotor Bolt Pattern (in.) | 6 x 5.50 in. |
| Minimum Recommended Wheel Diameter (in.) | 18 in. |
Compatibility
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