Wilwood Street Performance AERO4 BB Rear P-Brake Kits, Drilled For C10 Chevy, 5-Lug, 2.42 Offset, 14.00 Rotor

The Wilwood AERO4 Big Brake Rear Axle Kit (Part #140-10941-D) is designed as a technical upgrade for late-model high-performance vehicles and Chevy C10 trucks with 5-lug axles and a 2.42” offset. This kit fully replaces the original rear brakes with a high-capacity system that matches front big brake upgrades, using AERO4 four-piston callipers for strong and consistent braking power. The 14-inch drilled and slotted rotors provide superior heat dissipation, reducing the risk of brake fade during repeated stops. High-friction BP-20 brake pads further improve pedal feel and stopping control, while compatibility with ABS and OE master cylinders ensures reliable operation. The kit maintains the original internal parking brake assembly for practicality and safety.

KEY SPECIFICATIONS

- Application: Chevy C10 trucks with 5-lug axles, 2.42” axle offset
- Rotor: 14.00 inch diameter, vented, drilled and slotted SRP surface
- Calipers: Wilwood AERO4 four-piston, aluminium construction
- Pads: Wilwood BP-20 high-friction compound
- Parking Brake: Retains OE drum-style internal parking brake
- Wheel Fitment: Requires minimum 0.080" clearance between calliper and wheel
- Brake Line Input: 1/8-27 NPT inlet (hydraulic lines not included)
- Parking Brake Cable: Not included; vendor-recommended cable kits available
- Hardware: All major parts and fasteners included; may need additional parts for some custom setups

HOW INSTALLATION WORKS

Installation should be handled by someone familiar with disc brakes. The process starts with removing the stock rear brakes and clearing axle surfaces. The bracket kit is mounted first, followed by the installation of rotors onto the hats and then onto the axle studs, checking if the studs require modification. Calliper mounting brackets and spacers are shimmed as needed, and callipers are mounted over the rotors with pads installed. Brake lines and parking brake cables are not included and must be sourced separately. The kit is designed to reuse the OE drum-style parking brake. Proper bleeding of the system and bedding of pads and rotors are required before driving. The included manual provides installation diagrams and torque specs; always verify clearance if you use different wheels.

FITMENT AND FACTORY COMPATIBILITY NOTES

- Fits Chevy C10 trucks with 5-lug axles and 2.42” axle offset
- Uses OE internal drum-style parking brake
- Confirm axle flange diameter (max 6.61"), register, and bolt pattern before purchase
- Hydraulic lines and parking brake cables are not included; see vendor recommendations
- Hardware included may not fit all custom axle housings; always check fitment before assembly
- Adding disc brakes may change wheel track; confirm wheel offset and clearance with your wheels