QA1 67-73 Ford Mustang Pro Front Coil-Over System - Double Adj. - 10in x 500lbs/in - Aluminum - MD402-10500C

Take your classic Mustang’s suspension to the next level with QA1’s Front Pro Coil System. Purpose-built for 1967–1973 Mustangs, this kit combines modern adjustability with heavy-duty spring rates to handle the additional weight of ’67-‘73 Mustangs. Featuring 10” coil springs with a 500 lb./in. rate, it’s the ideal solution for drivers who demand sharper handling, firmer ride control, and the durability to manage higher horsepower and cornering loads. FULLY TUNABLE WITH DOUBLE ADJUSTABILITY QA1’s double adjustable shocks give you independent control of rebound and compression, each with 18 clicks of adjustment. This lets you fine-tune suspension behavior for daily comfort, aggressive street driving, or even track use - dialing in the perfect balance of ride and performance. SPRINGS OPTIMIZED FOR ’67–’73 MODELS The included 500 lb./in. springs are tailored specifically for the added front-end weight of 1967–1973 Mustangs with big block engines. They deliver firmer control while maintaining drivability, ensuring your Mustang feels planted and predictable at all times. RIDE HEIGHT FLEXIBILITY Easily adjust ride height from factory stock height down to 2” lower. Whether you prefer a stock appearance or a lowered stance, QA1 coilovers let you fine-tune your setup without compromising geometry or handling. BOLT-IN INSTALLATION Built as a true bolt-in system, QA1 Pro Coils require no welding or cutting. With powder-coated springs, premium hardware, and straightforward installation, you’ll be back on the road quickly with a suspension that’s built to last.

This Part Fits:

Year	Make	Model	Submodel
1967-1973	Ford	Mustang	Base
1969-1971	Ford	Mustang	Boss 302
1971-1972	Ford	Mustang	Boss 351
1969-1970	Ford	Mustang	Boss 429
1970-1973	Ford	Mustang	Grande
1970-1973	Ford	Mustang	Mach 1
1967-1970	Ford	Mustang	Shelby GT-350
1967-1970	Ford	Mustang	Shelby GT-500
1968	Ford	Mustang	Shelby GT-500KR

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Please note image may vary from product. Also, some items are special order. If delivery time is a concern, please contact us prior to purchase. 

Fidanza Performance is excited to offer QA1 Suspension

About - QA1 Suspension​

QA1 Precision Products, Inc., founded in 1993 and based in Lakeville, Minnesota, is a leading American manufacturer of high-performance suspension and driveline components. The company is known for producing quality coil-over kits, control arms, sway bars, adjustable shocks, and carbon fiber driveshafts, primarily for muscle cars, classic trucks, drag racing, and pro-touring builds.

QA1 stands out for its in-house engineering and manufacturing, with most products made in the USA. Their suspension systems are especially popular among enthusiasts looking to modernize older vehicles like Chevelles, Mustangs, and classic GM and Ford trucks. Known for their adjustability and durability, QA1 products are widely respected across both street and track applications.

With a strong reputation for quality and performance, QA1 supports the automotive community through events, sponsorships, and their annual open house. Their accessible performance upgrades have made them a trusted name in the aftermarket suspension world.

Fidanza Performance, founded in 1997, is a leading US manufacturer of high-quality lightweight aluminum flywheels, precision adjustable cam gears, and high-performance clutches. With nearly 20 years in the automotive performance market, Fidanza is renowned for its expertise and respected globally, offering products for a wide range of vehicles, from European sports cars to modern muscle cars and imports. The company originated in racing, with founder Lou Fidanza's success in the SCCA leading to the creation of specialty parts like aluminum flywheels. Fidanza has since expanded its product line to include cam gears and performance clutches, gaining a loyal customer base and worldwide recognition. In 2023 Fidanza opened the SpeedParts4Less Marketplace which sells other manufacturers quality high performance parts!