QA1 9" Rear Axle Housing w/ 4-Link Mustang 64-66

This 9" rear axle housing handles higher horsepower levels while integrating directly with your 1964-1966 Mustang's QA1 4-link suspension system for improved traction and stability. The center section and trailing arm brackets help to reduce flex under load while the axle tubes provide additional structural support. The housing includes 31-spline 1541H alloy axles rated for up to 650 horsepower, with the housing itself capable of supporting up to 800 horsepower.

Features and Benefits:
- Fabricated steel center section increases strength
- Fully formed trailing arm brackets reduce flex
- 3" OD axle tubes with 1/4" wall thickness
- Includes 31-spline 1541H alloy axles
- Axles rated up to 650 horsepower
- Housing rated up to 800 horsepower
- Big Ford Torino-style axle flanges
- 5x4.5" wheel bolt pattern
- Includes drain plug, fill plug, and vent port
- Semi-gloss powder coat finish resists corrosion

Designed for compatibility and serviceability, the housing features Big Ford Torino-style axle flanges, a standard 5x4.5" bolt pattern, and factory-correct wheel mounting surface width for proper fitment. Additional details such as a drain plug, fill port, vent tube, and jack pad support routine maintenance and long-term use.

Kit Includes:
- 9" Rear Axle Housing
- (2) 31-Spline Alloy Axles
- T-Bolts
- Housing Studs
- Roller Bearings

Vehicle Fitment:
- 1964-1966 Mustang