QA1 GM Pro Front Coil-Over System - Single Adj. - 11in x 300lbs/in - Pigtail - Aluminum - GS501-11300A

These QA1 GM Pro Coil Systems are a great option for anyone looking for fully adjustable ride height and valving control. Choose a spring rate and adjustability that fits your driving style, adjust the valving to match and you are on your way. These shocks also utilize a fully threaded body that allows you to adjust your ride height for the perfect stance or to finely tune the weight balance for superior handling. Specially designed for QA1's Pro Coil Systems, the American-made lightweight high travel springs have fewer coils and a smaller wire diameter, resulting in increased travel due to the larger distance between the coils. They reduce unsprung weight and react faster, optimizing suspension performance. Multiple spring rate options are also available and have been successfully tested in various applications, from casual street driving to hard core race applications. Adjustable Pro Coil System Features: Available in independent compression and rebound double adjustable, simultaneous compression and rebound adjustable, or drag "R" Series adjustable, Lightweight Billet Aluminum Coil-Over Shocks, High Travel Springs, Easy, Bolt-In Installation, Ride Height Adjustable, 100% Dyno Tested and Serialized, Serviceable and Rebuildable by QA1 Authorized Service Centers, Made in the USA, Used in drag racing, street performance, autocross, road racing and street rod applications, Sold in Pairs, Non-Adjustable Pro Coil System Features: Steel, Stock Appearing Coil-Over Shocks, High Travel Springs, Easy, Bolt-In Installation, Ride Height Adjustable, Used in drag racing, street performance, autocross, road racing and street rod applications, Sold in Pairs

This Part Fits:

Year	Make	Model	Submodel
1965-1967	Buick	Gran Sport	Base
1964-1967	Buick	Skylark	Base
1964-1967	Buick	Special	Base
1964-1967	Buick	Special	Deluxe
1956-1957	Chevrolet	Bel Air	Base
1956	Chevrolet	Bel Air	Beauville
1956-1957	Chevrolet	Bel Air	Nomad
1967	Chevrolet	Chevelle	300
1967	Chevrolet	Chevelle	300 Deluxe
1964-1967	Chevrolet	Chevelle	Base
1967	Chevrolet	Chevelle	Concours
1965-1967	Chevrolet	Chevelle	Deluxe
1964-1967	Chevrolet	Chevelle	SS
1964-1967	Chevrolet	El Camino	Base
1964-1967	Chevrolet	Malibu	Base
1955-1957	Chevrolet	Truck	3100
1955-1957	Chevrolet	Truck	3200
1955-1957	Chevrolet	Truck	3400
1955-1957	Chevrolet	Truck	3500
1955-1957	Chevrolet	Truck	3600
1955-1957	Chevrolet	Truck	3700
1955-1957	Chevrolet	Truck	3800
1955-1957	Chevrolet	Truck	Base
1955-1957	Chevrolet	Two-Ten Series	Base
1955-1957	Chevrolet	Two-Ten Series	Del Ray
1964-1967	Oldsmobile	442	Base
1964-1967	Oldsmobile	Cutlass	Base
1964-1967	Oldsmobile	Cutlass	Holiday
1967	Oldsmobile	Cutlass	Turnpike Cruiser
1964-1967	Oldsmobile	Vista Cruiser	Base
1964-1967	Oldsmobile	Vista Cruiser	Custom
1964-1967	Pontiac	GTO	Base
1964-1967	Pontiac	LeMans	Base
1964-1967	Pontiac	Tempest	Base
1964-1967	Pontiac	Tempest	Custom
1964-1967	Pontiac	Tempest	Safari

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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!