GNX4 / GNX5 Caliper – Part No: 120-10754
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GNX4 Caliper
Prod #: 120-10754
Price: $670.89
Available Caliper #120-10754 Configurations
GNX4 Caliper - Product Summary
Caliper No: 120-10754
Wilwood GNX4 Caliper Caliper Wilwood GNX4 Caliper Caliper Zoom Image

Piston Count 4
Piston Area (in²) 5.56
Piston Type Stainless
Dust Boot Yes
Rotor Dimensions
Rotor Width (in) 1.00
Rotor Diameter(in) 13.06
Pad Dimensions
Pad Area (in²) 11.15
Pad Volume (in³) 4.07
Duty Rating & Material
Material Forged Aluminium
Weight(Lbs) 7.7
Colors & Finish
Color Anodize
Finish Type III Anodize

Mount Center(in) 7.00
Mount Position
Mount Side Universal
Mount Type Lug
UPC Number
UPC 889545001006
Product Documents
Product Data Sheet

Installation Instructions

WARNING: Cancer and Reproductive Harm
Applicable to Brake Pads Only

120-10754 - Product Description

GNX4 Caliper

GNX4 calipers are the product of Wilwood's in-house FEA design and 3-D modeling technology. With its unyielding strength and superior piston design, the GNX4 generates positive pedal response and high clamping efficiency with a substantial weight savings over comparable OE Calipers. Base model calipers 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. Warning: Current GNX4 caliper assemblies are designed solely for use with DOT 5 fluids and should not be used with DOT 3, 4 or 5.1 fluids.

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. Each caliper also uses stainless SRS bridge plates to reduce wear from pad gouging at the caliper bridge. The spring-loaded action of the SRS plates also reduces noise by eliminating pad rattle and dampening the engagement harmonics

Product Specifications

Rotor Compatibility
Rotor Width (in) 1.00
Maximum Rotor Width (in) 1.00
Minimum Rotor Width (in) 0.88
Maximum Rotor Diameter(in) 13.06
Minimum Rotor Diameter(in) 11.75

Brake Pad Specifications
Brake Pad Type 1 9115
Brake Pad Type 2 N-A
Brake Pad Type 3 N-A
Total Pad Area (in²) 11.15
Total Pad Volume (in³) 4.07
Piston Specifications
Piston 1 Bore (in) 1.88
Piston 2 Bore (in) 1.88
Piston 3 Bore (in)
Total Piston Area (in²) 5.56

Mounting Specifications
Mount Type Lug
Mount Side Universal
Mount Center(in) 7.00
Mount Hole Size(in) 0.45
Mount Height(in) 2.41
Inlet Thread Size 1/8-27 NPT
Pad Dimensions & Part Numbers
Pad Dimensions for the GNX4 Caliper Pad Dimensions for the GNX4 Caliper Zoom Image
Axle Set P/N
Pad Type
Non-Bedded Pads - by Compounds
CM - Composite Metallic
CM - Composite Metallic
CM - Composite Metallic
Mount Dimensions & Part Numbers

Dimensions for the GNX4 Caliper Dimensions for the GNX4 Caliper Zoom Image

Additional Notes

Parts & Accessories

O-Ring Kit 130-11197
Replacement Dust Boot N-A
Replacement Piston 1 200-9846
Replacement Piston 2 200-9846
Replacement Piston 3 N-A
Replacement Piston 4 N-A
Cross-Over O-Ring Kit 130-10540
Bridge Bolt Kit N-A
Wear Plate L/H N-A
Wear Plate R/H N-A
Pad Retainer 180-11198
Bleed Screw Kit 220-0627
Self Bleeder Tube N-A
Cross-Over Tube N-A
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All images shown are for illustrative purposes only. Actual product received may be different than what is portrayed on the web site.
Wilwood makes every effort to maintain our web site to ensure the accuracy of prices and product information. However, product information and prices are subject to change without notice. Please call (805) 388-1188 before ordering to verify current prices and product information.
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Version: 3.04 May 22, 2023