QA1 67-70 Ford Mustang 9in Standard Rear Axle Assembly
SHIPPING - RETURNS - WARRANTY - CANCELLATION POLICY
*** Market Conditions after 2020 have changed the landscape of automotive parts. Although we try to stock 1000's of items in our multiple warehouse and use multiple distribution channels, having back-orders are unavoidable in today's market. If you are in need of a product quickly, we suggest email, message, or call us for availability so that we may explore your options.
Email: Sales@Speedzoneweb.com
Call: 407-846-8430
Text: 407-749-6314
Frequently Asked Questions
Already running one of QA1’s 4-Link Suspension Kits on your 1967–1970 Mustang? Upgrade your build with QA1’s fabricated 9” rear housing — engineered for seamless integration, improved strength, and simplified serviceability. This housing is purpose-built to withstand modern horsepower levels while maintaining precise suspension geometry and a clean, bolt-on installation. ENHANCE YOUR EXISTING QA1 4-LINK QA1’s 9” rear housing is designed to bolt directly to QA1 4-link systems, eliminating the need for custom fabrication. It features fully formed trailing arm brackets that reduce flex under hard acceleration and cornering, ensuring your suspension performs consistently under load. Whether you’re upgrading your street car or finishing a restomod project, this housing provides the perfect combination of strength, alignment precision, and OEM-level fit. EASY INSTALLATION & SERVICEABILITY QA1’s bolt-in design means no cutting or welding is required. Every detail - from the formed brackets to the integrated jack pad and fill/drain ports - is built to simplify installation and maintenance. If your Mustang already runs a QA1 4-link system, this housing bolts directly in for a precise, trouble-free upgrade.
- Big Ford “New Style Torino” flanges (2.5” axle offset) for wide brake compatibility
- Factory wheel mounting surface width for proper tire clearance – 1967–1970: 59 3/8”
- Fabricated steel center section engineered for maximum rigidity and long-term durability
- Heavy-duty 3” OD, ¼” wall axle tubes for high-performance street and strip builds
- Integrated drain plug, fill plug, vent port, and jack pad for simplified servicing
- Fully formed trailing arm brackets reduce flex for consistent suspension geometry
- Includes T-bolts, housing studs, and roller bearings for smooth, quiet operation
- 31-spline 1541H alloy axles rated for up to 650 HP, housing rated to 800 HP
- Durable semi-gloss powder coat finish resists corrosion and looks great
- Standard 5x4.5” bolt pattern fits popular Ford wheel options
- ½” x 3” wheel studs for secure wheel fitment
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1967-1970 | Ford | Mustang | Base |
| 1969-1970 | Ford | Mustang | Boss 302 |
| 1969-1970 | Ford | Mustang | Boss 429 |
| 1970 | Ford | Mustang | Grande |
| 1970 | Ford | Mustang | Mach 1 |
| 1967-1970 | Ford | Mustang | Shelby GT-350 |
| 1967-1970 | Ford | Mustang | Shelby GT-500 |
| 1968 | Ford | Mustang | Shelby GT-500KR |
Our History
For 26 years Speedzone Performance LLC has been providing aftermarket car parts to Central Floridians and 1000's of customers online. What makes us different than all the other places online? We have 3 actual brick and mortar locations where were serve customers daily and find new ways to provide support and assistance to the automotive community at large. From our in house SPDZ1 Brand, to our constantly growing in stock inventory, we strive to make our customer service and ease of purchase stand out from the rest! We are also one of the largest automotive part financing providers anywhere in the United States, and continue to provide more options for our customers every year. We love what we do, and it shows in every product we sell and every new customer who becomes a part of our Speedzone Family.