Ford Racing Axle Girdle Kit - Rear Differential Cover & Reinforcement

Ford Racing Axle Girdle Kits are engineered to structurally reinforce Ford rear differentials, replacing the factory steel cover with a high-strength aluminum assembly purpose-built for performance driving and competition. Developed through Ford's factory performance program, each kit is designed to protect critical drivetrain components where housing flex and bearing cap deformation pose the greatest risk — under hard acceleration, high-grip cornering, and repeated high-torque cycling.

At the core of every kit is a 356T6 aluminum casting that delivers an outstanding strength-to-weight ratio, adding rigidity to the differential housing without contributing unnecessary mass. Integrated load bolts apply targeted clamping force directly to the differential bearing caps, preventing deformation over time and stabilizing the gear set under load. The result is reduced housing flex, extended ring and pinion gear life, and improved protection against the chipped gear teeth and accelerated bearing wear that high-power and track applications demand.

Key Features:

• 356T6 aluminum construction replaces the factory rear differential cover with a lightweight, high-rigidity casting
• Integrated load bolts clamp differential bearing caps to prevent deformation under sustained high-torque loads
• Reduces housing flex during acceleration, braking, and cornering to stabilize the ring and pinion gear set
• Extends ring and pinion gear life by minimizing flex-induced wear and reducing the risk of chipped teeth
• Direct bolt-on fitment — no cutting, welding, or modification required
• Select variants include differential cooler ports for road racing and extended high-speed applications
• Each kit includes a gasket, mounting hardware, and installation instructions for a complete installation
• Features a machined Ford Racing logo on the cover face
• Made in the USA

The Ford Racing axle girdle lineup spans a broad range of Ford rear axle configurations — covering solid axle and independent rear suspension platforms across Mustang, Super Duty, Bronco, and other applications. Every variant is built to the same engineering standard: maximum reinforcement with minimal added weight, backed by Ford's factory performance program. Select the correct variant for your specific axle to ensure proper fit and full performance benefit.