QA1 64-66 Ford Mustang Rear Suspension Conversion System - 9in Housing Single Adj. 130lb/in - R123-130S

Upgrade your classic Mustang’s rear suspension with QA1’s complete 4-link system, featuring a custom QA1 9” rear housing. Designed specifically for 1964–1966 Mustangs, this all-in-one solution delivers modern handling, improved traction, and the strength to handle serious power. Whether you’re building a street-driven restomod or a pro-touring performer, this kit is built to transform how your Mustang drives and feels. MODERN HANDLING, CLASSIC FIT QA1’s triangulated 4-link replaces the factory leaf springs with a fully adjustable, geometry-correct rear suspension system. It dramatically improves traction, cornering, and ride quality by eliminating axle wrap and maintaining consistent pinion angle under load. The included QA1 9” rear housing ensures a perfect fit and the durability needed for today’s performance builds. SINGLE ADJUSTABLE COILOVERS This kit includes QA1’s single adjustable shocks, offering 18 clicks of combined rebound and compression adjustment. With one knob, you can easily fine-tune ride comfort and performance for your preferred driving style - from smooth street cruising to spirited cornering. STRONG, RELIABLE, AND READY FOR POWER The included QA1 9” housing features fully formed trailing arm brackets, a fabricated steel center section, and heavy-duty 3” OD axle tubes. Together, they create a rigid foundation capable of handling up to 800 horsepower. Matched 31-spline alloy axles ensure strength and smooth operation mile after mile. RIDE HEIGHT & ADJUSTABILITY Easily dial in your stance with adjustable ride height from factory level to 3” lower. This flexibility lets you fine-tune your Mustang’s appearance and performance without compromising geometry or drivability. EASY INSTALLATION This kit comes complete with everything you need for a straightforward installation - from the housing and brackets to shocks and hardware.

This Part Fits:

Year	Make	Model	Submodel
1964-1966	Ford	Mustang	Base
1965-1966	Ford	Mustang	Shelby GT-350
1966	Ford	Mustang	Shelby GT-350H

Please note product may vary from image, and some parts are special order. If delivery time is a concern, please contact us for stock status before buying.​

About - QA1

Since 1993, QA1 has been an industry leader in High Performance Suspension and Driveline for the automotive aftermarket and various other industries.

QA1 specializes in high-performance suspension components, including shock absorbers, rod ends, spherical bearings, struts, springs, ball joints and other related items. With products to fit a wide variety of applications, they have solutions for the circle track, drag racing, street performance, and street rodding markets.

Coilovers-

​From street to track, seamlessly adjust for any desired performance level. Coilovers deliver a perfect stance and look for your ride. With trusted USA-made quality, backed by a best-in-class warranty, they are a simple, yet significant upgrade for your vehicle.   

Springs- 

​QA1's Pro Coil Systems use uniquely-wound springs specific to various makes and models. These high travel springs are designed for immediate response, increased stability, and enhanced cornering abilities. Durable silver powder coat finish.

Carbon Fiber Driveshafts-

​Changing track conditions don't have to affect your performance. That's why QA1 offers two carbon fiber driveshaft options for super late models, limited late models, and Wissota and IMCA dirt late models. While both provide unmatched performance on any track, they each have their unique features designed to provide extra benefits in specific conditions. Our 3.2'' XMA style driveshaft takes advantage of rough conditions, providing extra alignment to avoid binding. Specifically engineered for tacky or rough conditions, the 3.2" dirt late model carbon fiber driveshafts offer extreme U-joint misalignment (XMA). The tube on this shaft has a higher torsional stiffness that results in less twist, which is great for heavy, fast, or rough tracks where traction isn't limited. The XMA style provides more U-joint misalignment than other designs on the market, and this prevents binding near the pinion yoke, allows more rear suspension articulation and provides more clearance under deceleration, which is especially critical when the car is "on the bars" during corner entry. The driveshafts have a uniform wall thickness created by optimum fiber lay up that ensures high RPM stability as well as extreme torque capacities. A thoroughly engineered surface protection is used to withstand extreme racing environments and provide a worry-free performance. The forged yokes are precision CNC machined and are specially developed for QA1's 11 step bonding procedure that ensures a better balance and minimal material waste. All QA1 driveshafts are precision balanced, track tested and proven. They are lighter, stiffer, stronger and safer than steel or aluminum driveshafts, and available in a variety of lengths and with or without a slip yoke. Custom lengths are also available. Made in the USA.​

​About GoTurbo.net/Armageddon Turbo Systems​

Get the best prices and service on QA1 products at Armageddon Turbo Systems (www.goturbo.net). We offer QA1's full line with the best service possible.

Armageddon Turbo Systems is a company specializing in aftermarket turbocharger systems for various vehicles, particularly trucks and muscle cars. We offer complete turbocharger kits designed to significantly increase engine performance and power output.

Armageddon Turbo Systems gained prominence for their innovative approach to turbocharging, providing bolt-on solutions that allow enthusiasts to add substantial horsepower and torque to their vehicles without extensive modifications. Their kits typically include all necessary components for installation, including the turbocharger unit, intercooler, piping, fuel system upgrades, and engine management solutions.

​Get the best parts and pricing on QA1 products today at www.goturbo.net - Armageddon Turbo Systems!