QA! 67-70 Ford Mustang 9in Standard Rear Axle Assembly

If you're building a 1967-1970 Ford Mustang and already have a QA1 4-Link suspension kit, this fabricated 9-inch rear axle assembly is the perfect upgrade. It's designed to bolt directly onto your existing QA1 4-link system, making installation straightforward without needing custom fabrication. This housing is built to handle the demands of modern horsepower while keeping your suspension geometry precise and your installation clean.

This axle housing is constructed from a fabricated steel center section and heavy-duty 3-inch OD, quarter-inch wall axle tubes, engineered for maximum rigidity and long-term durability, making it suitable for high-performance street and strip builds. It features fully formed trailing arm brackets that are designed to reduce flex during hard acceleration and cornering, ensuring consistent suspension performance. The design also simplifies servicing with an integrated drain plug, fill plug, vent port, and jack pad. The housing comes with T-bolts, housing studs, and roller bearings for smooth, quiet operation, and includes 31-spline 1541H alloy axles rated for up to 650 HP, with the housing itself rated to 800 HP.

This assembly is designed for a factory wheel mounting surface width of 59 3/8 inches for 1967-1970 Mustangs, ensuring proper tire clearance. It also features Big Ford “New Style Torino” flanges with a 2.5-inch axle offset, which offers wide brake compatibility, and a standard 5x4.5-inch bolt pattern with half-inch by three-inch wheel studs for a secure wheel fit. The durable semi-gloss powder coat finish helps resist corrosion and provides a great look.