When it comes to upgrading your muscle car’s suspension, few improvements make a bigger impact than installing a high-quality rear-end housing. QA1’s 9-inch rear end for first-generation F-bodies and 1968–1972 Novas is built for enthusiasts who want serious strength, performance, and reliability. Designed to work seamlessly with QA1’s 4-link suspension system, this housing is a direct-fit upgrade that enhances traction, durability, and overall driving experience.

Engineered For Performance And Strength

QA1’s 9-inch rear end is engineered for serious builds. The fabricated center section delivers maximum strength, while the fully formed trailing-arm brackets reduce flex under heavy loads, maintaining your suspension’s geometry even during aggressive launches and cornering. Heavy-duty 3-inch outside-diameter axle tubes with a 1/4-inch wall thickness provide the durability needed for high-horsepower applications.

Inside, 31-spline 1541H alloy axles support up to 650 horsepower, while the housing itself can handle up to 800 horsepower. A standard 5-on-4-3/4-inch bolt pattern ensures compatibility with a wide range of wheels. The semi-gloss powder-coat finish offers long-lasting protection and a clean, sleek look.

Easy Maintenance

QA1’s 9-inch rearend includes features that make servicing easy and straightforward. A dedicated fill port, drain plug, vent port, and jack plate simplify maintenance and fluid changes. The housing also comes complete with T-bolts and housing studs for assembling axle shafts and installing third members, as well as high-quality roller bearings for smooth operation and long-lasting reliability.

Specifications And Installation

QA1’s housing features a 60-inch factory wheel mounting surface width, ensuring easy wheel and tire fitment. It comes with Big Ford New Style Torino flanges, featuring a 2.5-inch axle offset for brake compatibility, 1/2-inch x 3-inch wheel studs for improved fitment with alloy wheels, and a 2.770-inch hub diameter. Designed as a bolt-on solution, it requires no custom fabrication, making installation simple and efficient.

Made In The USA And Backed By QA1

Proudly made in the USA, QA1’s 9-inch rearend is backed by a one-year warranty against manufacturer defects, giving you peace of mind for your build. If you are looking for a proven solution to handle serious power while integrating seamlessly with QA1’s 4-link system, this rearend is the perfect upgrade for your GM F- or X-body.