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Wilwood Brakes GNX4 Rear Brake Kit 140-11451

Wilwood Brakes GNX4 Rear Brake Kit 140-11451
Wilwood Brakes GNX4 Rear Brake Kit 140-11451Wilwood Brakes GNX4 Rear Brake Kit 140-11451Wilwood Brakes GNX4 Rear Brake Kit 140-11451Wilwood Brakes GNX4 Rear Brake Kit 140-11451Wilwood Brakes GNX4 Rear Brake Kit 140-11451
$2,576.99 ea
NEWARRIVING SOONEstimated Ship Date 10/26/2022 (If Ordered Today)3 available from WILWOOD ENGINEERING as of 09/24/2022
Model: 3924626
Supplier has not provided any fitment data for this product.
[More Info]

The GNX4 Brake Kit is the product of Wilwood’s in-house FEA design and 3-D modeling technology. The GNX4 caliper paired with 12.00" diameter, .95" width rotors offers a durable, high torque braking solution. This is the current upgrade for AM General Military REV HUMVEE vehicles and will require modifications to vehicle platform for installation. The GNX4 caliper with its unyielding strength and superior piston design generates positive pedal response and high clamping efficiency with a substantial weight savings over original calipers. The caliper feature a natural aluminum finish protected by a durable clear coat anodizing. Forged billet aluminum bodies, stainless steel pistons, and high-temperature seals put an end to the rust, bore pitting, and seal failures that plague many OE caliper design. Stainless steel pistons delay the heat transfer from the pads while the aluminum calipers dissipate the heat quicker than the OE cast iron calipers. Cooler operating temperatures translate into longer service life, regardless of the driving environment. Note: rear kits do not come with provision for parking brake.

Fitment Notes

About Wilwood Engineering

Wilwood Engineering designs and manufactures high-performance disc brake systems. Since the company’s inception in 1977 by Bill Wood, we have developed a substantial matrix of brake components and engineering techniques that allow us to quickly and reliably create brake systems for almost any application. Our core ability is the rapid development of custom engineered brake systems using a combination of off-the-shelf and custom components. In addition to designing and manufacturing brakes for all types of competitive motor sports, Wilwood also manufactures brake systems and components for agricultural equipment, industrial applications, utility vehicles, snowmobiles, quads, motorcycles and military vehicles.

With headquarters in Camarillo, California, Wilwood employs approximately 250 people. We have on-shelf stock of more than 300 different brake calipers, 200 rotor designs, 100 master cylinder designs and a wide assortment of brackets, fittings, valves and brake lines. Our off-shelf brake calipers range in size from tiny calipers used on go-carts and light duty industrial equipment, to heavy duty original equipment brakes for the U.S. military Humvee.

Wilwood's engineering department uses the latest computer-aided design and manufacturing techniques in conjunction with finite element analysis, dynamic test and cycle test equipment, to find high-performance and reliability solutions for the most difficult braking tasks. Our extensive inventory of proprietary on-the-shelf components allow us to provide cost-effective solutions for unique brake applications.

Wilwood is ISO 9000 compliant and has extensive experience maintaining quality levels of 100ppm or less for original equipment manufacturers.


Kit Summary
Axle Offset 0.00
Caliper Type 4 - Clear Anodize
Min Wheel Diameter Req'd* 16
Mount Type Lug
Rear End Axle OEM
Rotor Diameter 12.00
Kit Components & Specs / Rotors
Bedded No
Design Type HP
Dynamically Balanced No
Left Hand - Part No 160-9535
Material Iron
Outside Diameter (in) 12.00
Right Hand - Part No 160-9535
Style Plain Face
Surface Finish Plain
Type 53 Vane
Vane Count 56 V
Width (in) 0.95
Parts & Accessories / Caliper Parts
Bleed Screw Kit 220-0627
CrossOver O-Ring Kit 130-10540
O-ring Kit 130-11197
Pad Retainer 180-11198
Replacement Piston 1 200-9846
Replacement Piston 2 200-9846
Kit Components & Specs / Calipers
Brake Pad Area (In²) 11.15
Brake Pad Plate 9115
Brake Pad Volume (In³) 4.07
Finish Color Clear Anodize
Left Hand - Part No 120-10754
Mount Type Lug
Pad Compound SM
Piston 1 Bore (in) 1.88
Piston 2 Bore (in) 1.88
Piston Area (In²) 5.56
Piston Count 4
Piston Type Stainless
Right Hand - Part No 120-10754
Type GNX4


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Muscle Cars & Classics 2022