Wilwood AERO4 RearTruck Kit 14.25in Drilled 1999-2010 GM 1500-SUV 2 Piston OE Caliper

SKU: WIL140-9838-D

Disc Brake Kits

WIL Aero Brake Kit...

Wilwood

Wilwood AERO4 RearTruck Kit 14.25in Drilled 1999-2010 GM 1500-SUV 2 Piston OE Caliper

SKU: WIL140-9838-D

Disc Brake Kits

WIL Aero Brake Kit...

Available from MFR. This item is available from the manufacturer's distribution centre. The dispatch timeframe shown is an estimate based on historical order processing and release times for this part. This item is not held in our own warehouse, and actual dispatch timing may vary depending on manufacturer workload and logistics at the time of ordering.

We accept

Description

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.

Part Type

Disc Brake Kits

Data: v4.2 - Upd: 2026-10-13 21:16:13

Specifications

Product Attributes - UPC: 889545032499
Product Attributes - Brand: Wilwood Disc Brakes
Product Attributes - Notes: Retains full function of factory parking brake. Fits 6-lug models.
Product Attributes - Position: Rear
Product Attributes - Quantity: Sold as a kit.
Product Attributes - Part Type: Disc Brake Kits
Product Attributes - Product Line: Wilwood AERO4 Big Brake Rear Brake Kits
Product Attributes - Rear Rotor Style: Cross-drilled/Slotted surface
Product Attributes - Rear Caliper Color: Black
Product Attributes - Parking Brake Style: Internal drum
Product Attributes - Rear Rotor Diameter: 14.25 in./361.95mm
Product Attributes - Rear Rotor Included: Yes
Product Attributes - Brake Hoses Included: No
Product Attributes - Front Rotor Included: No
Product Attributes - Rear Caliper Included: Yes
Product Attributes - Rear Caliper Material: Forged billet aluminum
Product Attributes - Brake Booster Included: No
Product Attributes - Front Caliper Included: No
Product Attributes - Front Spindles Included: No
Product Attributes - Parking Brake Provision: Yes
Product Attributes - Rear Rotor Construction: Vented
Product Attributes - Master Cylinder Included: No
Product Attributes - Manufacturer's Part Number: 140-9838-D
Product Attributes - Rear Rotor Thickness (in.): 1.25
Product Attributes - Rear Caliper Piston Quantity: Four
Product Attributes - Brake Rotor Bolt Pattern (mm): 6 x 139.70mm
Product Attributes - Brake Rotor Bolt Pattern (in.): 6 x 5.50 in.
Product Attributes - Minimum Recommended Wheel Diameter (in.): 18 in.

Reference Information

Brand Name/s	Wilwood
StreetFX SKU	wil140-9838-D
SFX Item ID	4404454
Supplier Item Code	4404454
Manufacturer SKU	140-9838-D
Manufacturer UPC	889545032499
Alternative References	AERO4, 14.25in, 1500-SUV

Compatibility

Application Data

Make	CHEVROLET
Model	AVALANCHE 1500
Submodel	BASE
Beginning Year	2002
Ending Year	2005
Engine Type	V8
Engine Size	5.3L/325
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Liter	5.3
CID	325
CC	5328
Drivetrain	4WD
Application Notes	Front Brake Type: Disc, Rear BrakeType: Disc. KIT,REAR,GM TRK/SUV,1500,99-UP,OE 2 PISTON CALIPER,14.25 ROTOR,DRILLED; RTR:14.25-IN DIA, SRP DRILLED ROTOR, DRILLED & SLOTTED; CLPR:AERO4, 4-PISTON, BLACK POWDER COAT For OE rears with dual piston calipers. 16" Front kits use Flexline kit 220-8998. 14.25
Engine VIN Code	T

Make	CHEVROLET
Model	AVALANCHE 1500
Submodel	BASE
Beginning Year	2002
Ending Year	2005
Engine Type	V8
Engine Size	5.3L/325
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Liter	5.3
CID	325
CC	5328
Drivetrain	RWD
Application Notes	Front Brake Type: Disc, Rear BrakeType: Disc. KIT,REAR,GM TRK/SUV,1500,99-UP,OE 2 PISTON CALIPER,14.25 ROTOR,DRILLED; RTR:14.25-IN DIA, SRP DRILLED ROTOR, DRILLED & SLOTTED; CLPR:AERO4, 4-PISTON, BLACK POWDER COAT For OE rears with dual piston calipers. 16" Front kits use Flexline kit 220-8998. 14.25
Engine VIN Code	T

Make	CHEVROLET
Model	AVALANCHE 1500
Submodel	BASE
Beginning Year	2005
Ending Year	2005
Engine Type	V8
Engine Size	5.3L/325
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Liter	5.3
CID	325
CC	5328
Drivetrain	4WD
Application Notes	Front Brake Type: Disc, Rear BrakeType: Disc. KIT,REAR,GM TRK/SUV,1500,99-UP,OE 2 PISTON CALIPER,14.25 ROTOR,DRILLED; RTR:14.25-IN DIA, SRP DRILLED ROTOR, DRILLED & SLOTTED; CLPR:AERO4, 4-PISTON, BLACK POWDER COAT For OE rears with dual piston calipers. 16" Front kits use Flexline kit 220-8998. 14.25
Engine VIN Code	Z

Make	CHEVROLET
Model	AVALANCHE 1500
Submodel	BASE
Beginning Year	2005
Ending Year	2005
Engine Type	V8
Engine Size	5.3L/325
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Liter	5.3
CID	325
CC	5328
Drivetrain	RWD
Application Notes	Front Brake Type: Disc, Rear BrakeType: Disc. KIT,REAR,GM TRK/SUV,1500,99-UP,OE 2 PISTON CALIPER,14.25 ROTOR,DRILLED; RTR:14.25-IN DIA, SRP DRILLED ROTOR, DRILLED & SLOTTED; CLPR:AERO4, 4-PISTON, BLACK POWDER COAT For OE rears with dual piston calipers. 16" Front kits use Flexline kit 220-8998. 14.25
Engine VIN Code	Z

Make	CHEVROLET
Model	AVALANCHE 1500
Submodel	LS
Beginning Year	2005
Ending Year	2006
Engine Type	V8
Engine Size	5.3L/325
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Liter	5.3
CID	325
CC	5328
Drivetrain	4WD
Application Notes	Front Brake Type: Disc, Rear BrakeType: Disc. KIT,REAR,GM TRK/SUV,1500,99-UP,OE 2 PISTON CALIPER,14.25 ROTOR,DRILLED; RTR:14.25-IN DIA, SRP DRILLED ROTOR, DRILLED & SLOTTED; CLPR:AERO4, 4-PISTON, BLACK POWDER COAT For OE rears with dual piston calipers. 16" Front kits use Flexline kit 220-8998. 14.25
Engine VIN Code	T

Make	CHEVROLET
Model	AVALANCHE 1500
Submodel	LS
Beginning Year	2005
Ending Year	2006
Engine Type	V8
Engine Size	5.3L/325
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Liter	5.3
CID	325
CC	5328
Drivetrain	4WD
Application Notes	Front Brake Type: Disc, Rear BrakeType: Disc. KIT,REAR,GM TRK/SUV,1500,99-UP,OE 2 PISTON CALIPER,14.25 ROTOR,DRILLED; RTR:14.25-IN DIA, SRP DRILLED ROTOR, DRILLED & SLOTTED; CLPR:AERO4, 4-PISTON, BLACK POWDER COAT For OE rears with dual piston calipers. 16" Front kits use Flexline kit 220-8998. 14.25
Engine VIN Code	Z

Make	CHEVROLET
Model	AVALANCHE 1500
Submodel	LS
Beginning Year	2005
Ending Year	2006
Engine Type	V8
Engine Size	5.3L/325
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Liter	5.3
CID	325
CC	5328
Drivetrain	RWD
Application Notes	Front Brake Type: Disc, Rear BrakeType: Disc. KIT,REAR,GM TRK/SUV,1500,99-UP,OE 2 PISTON CALIPER,14.25 ROTOR,DRILLED; RTR:14.25-IN DIA, SRP DRILLED ROTOR, DRILLED & SLOTTED; CLPR:AERO4, 4-PISTON, BLACK POWDER COAT For OE rears with dual piston calipers. 16" Front kits use Flexline kit 220-8998. 14.25
Engine VIN Code	T

Make	CHEVROLET
Model	AVALANCHE 1500
Submodel	LS
Beginning Year	2005
Ending Year	2006
Engine Type	V8
Engine Size	5.3L/325
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Liter	5.3
CID	325
CC	5328
Drivetrain	RWD
Application Notes	Front Brake Type: Disc, Rear BrakeType: Disc. KIT,REAR,GM TRK/SUV,1500,99-UP,OE 2 PISTON CALIPER,14.25 ROTOR,DRILLED; RTR:14.25-IN DIA, SRP DRILLED ROTOR, DRILLED & SLOTTED; CLPR:AERO4, 4-PISTON, BLACK POWDER COAT For OE rears with dual piston calipers. 16" Front kits use Flexline kit 220-8998. 14.25
Engine VIN Code	Z

Make	CHEVROLET
Model	AVALANCHE 1500
Submodel	LT
Beginning Year	2005
Ending Year	2006
Engine Type	V8
Engine Size	5.3L/325
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Liter	5.3
CID	325
CC	5328
Drivetrain	4WD
Application Notes	Front Brake Type: Disc, Rear BrakeType: Disc. KIT,REAR,GM TRK/SUV,1500,99-UP,OE 2 PISTON CALIPER,14.25 ROTOR,DRILLED; RTR:14.25-IN DIA, SRP DRILLED ROTOR, DRILLED & SLOTTED; CLPR:AERO4, 4-PISTON, BLACK POWDER COAT For OE rears with dual piston calipers. 16" Front kits use Flexline kit 220-8998. 14.25
Engine VIN Code	T

Make	CHEVROLET
Model	AVALANCHE 1500
Submodel	LT
Beginning Year	2005
Ending Year	2006
Engine Type	V8
Engine Size	5.3L/325
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Liter	5.3
CID	325
CC	5328
Drivetrain	4WD
Application Notes	Front Brake Type: Disc, Rear BrakeType: Disc. KIT,REAR,GM TRK/SUV,1500,99-UP,OE 2 PISTON CALIPER,14.25 ROTOR,DRILLED; RTR:14.25-IN DIA, SRP DRILLED ROTOR, DRILLED & SLOTTED; CLPR:AERO4, 4-PISTON, BLACK POWDER COAT For OE rears with dual piston calipers. 16" Front kits use Flexline kit 220-8998. 14.25
Engine VIN Code	Z

Make	CHEVROLET
Model	AVALANCHE 1500
Submodel	LT
Beginning Year	2005
Ending Year	2006
Engine Type	V8
Engine Size	5.3L/325
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Liter	5.3
CID	325
CC	5328
Drivetrain	RWD
Application Notes	Front Brake Type: Disc, Rear BrakeType: Disc. KIT,REAR,GM TRK/SUV,1500,99-UP,OE 2 PISTON CALIPER,14.25 ROTOR,DRILLED; RTR:14.25-IN DIA, SRP DRILLED ROTOR, DRILLED & SLOTTED; CLPR:AERO4, 4-PISTON, BLACK POWDER COAT For OE rears with dual piston calipers. 16" Front kits use Flexline kit 220-8998. 14.25
Engine VIN Code	T

Make	CHEVROLET
Model	AVALANCHE 1500
Submodel	LT
Beginning Year	2005
Ending Year	2006
Engine Type	V8
Engine Size	5.3L/325
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Liter	5.3
CID	325
CC	5328
Drivetrain	RWD
Application Notes	Front Brake Type: Disc, Rear BrakeType: Disc. KIT,REAR,GM TRK/SUV,1500,99-UP,OE 2 PISTON CALIPER,14.25 ROTOR,DRILLED; RTR:14.25-IN DIA, SRP DRILLED ROTOR, DRILLED & SLOTTED; CLPR:AERO4, 4-PISTON, BLACK POWDER COAT For OE rears with dual piston calipers. 16" Front kits use Flexline kit 220-8998. 14.25
Engine VIN Code	Z

Make	CHEVROLET
Model	AVALANCHE 1500
Submodel	NORTH FACE
Beginning Year	2002
Ending Year	2003
Engine Type	V8
Engine Size	5.3L/325
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Liter	5.3
CID	325
CC	5328
Drivetrain	4WD
Application Notes	Front Brake Type: Disc, Rear BrakeType: Disc. KIT,REAR,GM TRK/SUV,1500,99-UP,OE 2 PISTON CALIPER,14.25 ROTOR,DRILLED; RTR:14.25-IN DIA, SRP DRILLED ROTOR, DRILLED & SLOTTED; CLPR:AERO4, 4-PISTON, BLACK POWDER COAT For OE rears with dual piston calipers. 16" Front kits use Flexline kit 220-8998. 14.25
Engine VIN Code	T

Make	CHEVROLET
Model	AVALANCHE 1500
Submodel	ON ROAD EDITION
Beginning Year	2002
Ending Year	2003
Engine Type	V8
Engine Size	5.3L/325
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Liter	5.3
CID	325
CC	5328
Drivetrain	RWD
Application Notes	Front Brake Type: Disc, Rear BrakeType: Disc. KIT,REAR,GM TRK/SUV,1500,99-UP,OE 2 PISTON CALIPER,14.25 ROTOR,DRILLED; RTR:14.25-IN DIA, SRP DRILLED ROTOR, DRILLED & SLOTTED; CLPR:AERO4, 4-PISTON, BLACK POWDER COAT For OE rears with dual piston calipers. 16" Front kits use Flexline kit 220-8998. 14.25
Engine VIN Code	T

Make	CHEVROLET
Model	AVALANCHE 1500
Submodel	WBH
Beginning Year	2003
Ending Year	2003
Engine Type	V8
Engine Size	5.3L/325
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Liter	5.3
CID	325
CC	5328
Drivetrain	4WD
Application Notes	Front Brake Type: Disc, Rear BrakeType: Disc. KIT,REAR,GM TRK/SUV,1500,99-UP,OE 2 PISTON CALIPER,14.25 ROTOR,DRILLED; RTR:14.25-IN DIA, SRP DRILLED ROTOR, DRILLED & SLOTTED; CLPR:AERO4, 4-PISTON, BLACK POWDER COAT For OE rears with dual piston calipers. 16" Front kits use Flexline kit 220-8998. 14.25
Engine VIN Code	T

Make	CHEVROLET
Model	AVALANCHE 1500
Submodel	WBH
Beginning Year	2003
Ending Year	2003
Engine Type	V8
Engine Size	5.3L/325
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Liter	5.3
CID	325
CC	5328
Drivetrain	RWD
Application Notes	Front Brake Type: Disc, Rear BrakeType: Disc. KIT,REAR,GM TRK/SUV,1500,99-UP,OE 2 PISTON CALIPER,14.25 ROTOR,DRILLED; RTR:14.25-IN DIA, SRP DRILLED ROTOR, DRILLED & SLOTTED; CLPR:AERO4, 4-PISTON, BLACK POWDER COAT For OE rears with dual piston calipers. 16" Front kits use Flexline kit 220-8998. 14.25
Engine VIN Code	T

Make	CHEVROLET
Model	AVALANCHE 1500
Submodel	Z66
Beginning Year	2004
Ending Year	2006
Engine Type	V8
Engine Size	5.3L/325
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Liter	5.3
CID	325
CC	5328
Drivetrain	RWD
Application Notes	Front Brake Type: Disc, Rear BrakeType: Disc. KIT,REAR,GM TRK/SUV,1500,99-UP,OE 2 PISTON CALIPER,14.25 ROTOR,DRILLED; RTR:14.25-IN DIA, SRP DRILLED ROTOR, DRILLED & SLOTTED; CLPR:AERO4, 4-PISTON, BLACK POWDER COAT For OE rears with dual piston calipers. 16" Front kits use Flexline kit 220-8998. 14.25
Engine VIN Code	T

Make	CHEVROLET
Model	AVALANCHE 1500
Submodel	Z66
Beginning Year	2005
Ending Year	2006
Engine Type	V8
Engine Size	5.3L/325
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Liter	5.3
CID	325
CC	5328
Drivetrain	RWD
Application Notes	Front Brake Type: Disc, Rear BrakeType: Disc. KIT,REAR,GM TRK/SUV,1500,99-UP,OE 2 PISTON CALIPER,14.25 ROTOR,DRILLED; RTR:14.25-IN DIA, SRP DRILLED ROTOR, DRILLED & SLOTTED; CLPR:AERO4, 4-PISTON, BLACK POWDER COAT For OE rears with dual piston calipers. 16" Front kits use Flexline kit 220-8998. 14.25
Engine VIN Code	Z

Make	CHEVROLET
Model	AVALANCHE 1500
Submodel	Z71
Beginning Year	2002
Ending Year	2006
Engine Type	V8
Engine Size	5.3L/325
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Liter	5.3
CID	325
CC	5328
Drivetrain	4WD
Application Notes	Front Brake Type: Disc, Rear BrakeType: Disc. KIT,REAR,GM TRK/SUV,1500,99-UP,OE 2 PISTON CALIPER,14.25 ROTOR,DRILLED; RTR:14.25-IN DIA, SRP DRILLED ROTOR, DRILLED & SLOTTED; CLPR:AERO4, 4-PISTON, BLACK POWDER COAT For OE rears with dual piston calipers. 16" Front kits use Flexline kit 220-8998. 14.25
Engine VIN Code	T

Make	CHEVROLET
Model	AVALANCHE 1500
Submodel	Z71
Beginning Year	2005
Ending Year	2006
Engine Type	V8
Engine Size	5.3L/325
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Liter	5.3
CID	325
CC	5328
Drivetrain	4WD
Application Notes	Front Brake Type: Disc, Rear BrakeType: Disc. KIT,REAR,GM TRK/SUV,1500,99-UP,OE 2 PISTON CALIPER,14.25 ROTOR,DRILLED; RTR:14.25-IN DIA, SRP DRILLED ROTOR, DRILLED & SLOTTED; CLPR:AERO4, 4-PISTON, BLACK POWDER COAT For OE rears with dual piston calipers. 16" Front kits use Flexline kit 220-8998. 14.25
Engine VIN Code	Z

Make	CHEVROLET
Model	SILVERADO 1500
Submodel	BASE
Beginning Year	2001
Ending Year	2002
Engine Type	V6
Engine Size	4.3L/262
Engine Family	GM V6
Liter	4.3
CID	262
Drivetrain	4WD
Application Notes	Front Brake Type: Disc, Rear BrakeType: Disc. KIT,REAR,GM TRK/SUV,1500,99-UP,OE 2 PISTON CALIPER,14.25 ROTOR,DRILLED; RTR:14.25-IN DIA, SRP DRILLED ROTOR, DRILLED & SLOTTED; CLPR:AERO4, 4-PISTON, BLACK POWDER COAT For OE rears with dual piston calipers. 16" Front kits use Flexline kit 220-8998. 14.25
Engine VIN Code	W

Make	CHEVROLET
Model	SILVERADO 1500
Submodel	BASE
Beginning Year	2001
Ending Year	2002
Engine Type	V6
Engine Size	4.3L/262
Engine Family	GM V6
Liter	4.3
CID	262
Drivetrain	RWD
Application Notes	Front Brake Type: Disc, Rear BrakeType: Disc. KIT,REAR,GM TRK/SUV,1500,99-UP,OE 2 PISTON CALIPER,14.25 ROTOR,DRILLED; RTR:14.25-IN DIA, SRP DRILLED ROTOR, DRILLED & SLOTTED; CLPR:AERO4, 4-PISTON, BLACK POWDER COAT For OE rears with dual piston calipers. 16" Front kits use Flexline kit 220-8998. 14.25
Engine VIN Code	W

Make	CHEVROLET
Model	SILVERADO 1500
Submodel	BASE
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Engine Size	4.8L/294
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Liter	4.8
CID	294
Drivetrain	4WD
Application Notes	Front Brake Type: Disc, Rear BrakeType: Disc. KIT,REAR,GM TRK/SUV,1500,99-UP,OE 2 PISTON CALIPER,14.25 ROTOR,DRILLED; RTR:14.25-IN DIA, SRP DRILLED ROTOR, DRILLED & SLOTTED; CLPR:AERO4, 4-PISTON, BLACK POWDER COAT For OE rears with dual piston calipers. 16" Front kits use Flexline kit 220-8998. 14.25
Engine VIN Code	V

Make	CHEVROLET
Model	SILVERADO 1500
Submodel	BASE
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Engine Size	4.8L/294
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Liter	4.8
CID	294
Drivetrain	RWD
Application Notes	Front Brake Type: Disc, Rear BrakeType: Disc. KIT,REAR,GM TRK/SUV,1500,99-UP,OE 2 PISTON CALIPER,14.25 ROTOR,DRILLED; RTR:14.25-IN DIA, SRP DRILLED ROTOR, DRILLED & SLOTTED; CLPR:AERO4, 4-PISTON, BLACK POWDER COAT For OE rears with dual piston calipers. 16" Front kits use Flexline kit 220-8998. 14.25
Engine VIN Code	V

Make	CHEVROLET
Model	SILVERADO 1500
Submodel	BASE
Beginning Year	2001
Ending Year	2004
Engine Type	V8
Engine Size	5.3L/325
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Liter	5.3
CID	325
CC	5328
Drivetrain	4WD
Application Notes	Front Brake Type: Disc, Rear BrakeType: Disc. KIT,REAR,GM TRK/SUV,1500,99-UP,OE 2 PISTON CALIPER,14.25 ROTOR,DRILLED; RTR:14.25-IN DIA, SRP DRILLED ROTOR, DRILLED & SLOTTED; CLPR:AERO4, 4-PISTON, BLACK POWDER COAT For OE rears with dual piston calipers. 16" Front kits use Flexline kit 220-8998. 14.25
Engine VIN Code	T