Wilwood 140-11450 GNX4 Front Disc Brake Kit with 12.00" Rotors

The Wilwood 140-11450 GNX4 Front Disc Brake Kit is engineered using Wilwood's proprietary in-house Finite Element Analysis (FEA) design and 3-D modeling technology, delivering a performance-engineered braking solution built to handle extreme demands. This kit pairs the high-strength GNX4 caliper with 12.00" diameter, 0.95" wide rotors for a durable, high-torque braking package. Note: installation will require modifications to the vehicle platform.

GNX4 Caliper Features:

• Forged billet aluminum caliper body — delivers exceptional structural rigidity with significant weight savings over OE cast iron calipers
• Stainless steel pistons — delay heat transfer from brake pads, reducing thermal fade and extending pad life
• High-temperature seals — eliminate the bore pitting, rust, and seal failures common to OEM caliper designs
• Natural aluminum finish with a durable clear coat anodizing for lasting corrosion protection
• Superior piston design generates positive pedal response and high clamping efficiency

Rotor Specifications:

• Rotor diameter: 12.00"
• Rotor width: 0.95"
• Plain rotor surface for reliable, consistent braking performance

Thermal Management:

• Aluminum caliper construction dissipates heat more efficiently than OE cast iron units
• Stainless steel pistons act as a thermal barrier, slowing heat transfer to the hydraulic fluid
• Cooler operating temperatures result in longer service life across all driving conditions

Backed by Wilwood Engineering's decades of brake development expertise, the GNX4 kit is purpose-built to replace undersized or worn OEM brake components with a high-performance alternative that improves stopping power, reduces brake fade, and outlasts conventional cast iron caliper systems.