QA1 73-77 GM A-Body Pro Rear Coil-Over System - MOD Series - 12in x 200lbs/in - Aluminum - RCK52445

soft or firm compression and rebound valve packs also available. Once the desired valving is in place, the unique double adjustable design, with adjustable low-speed bleed, allows for fully independent control over the compression and rebound characteristics. With all these adjustability options, the MOD Series shock achieves an expansive force curve capability and an unprecedented level of tunability. The shock also features mounting adjustability to accommodate a variety of vehicles and mounting configurations. The nitrogen-charged canister is available in a piggyback or remote configuration for ease of installation in tight areas, and the base eyelet is indexable, so you can unbolt it and reattach it at the angle you need for the best shock and canister placement. Like all QA1 shocks, the MOD Series shock is 100% dyno tested and serialized and proudly made in QA1's Lakeville, Minnesota facility.

This Part Fits:

Year	Make	Model	Submodel
1973-1977	Buick	Regal	Base
1976-1977	Buick	Regal	SR
1973	Chevrolet	Chevelle	Deluxe
1973-1977	Chevrolet	El Camino	Base
1975-1977	Chevrolet	El Camino	Classic
1977	Chevrolet	El Camino	Conquista
1973-1974	Chevrolet	El Camino	Custom
1973-1977	Chevrolet	El Camino	SS
1973-1975	Chevrolet	Laguna	Base
1973	Chevrolet	Laguna	Estate
1975-1976	Chevrolet	Laguna	S3
1974	Chevrolet	Laguna	Type S-3
1973-1977	Chevrolet	Malibu	Base
1974-1977	Chevrolet	Malibu	Classic
1975-1976	Chevrolet	Malibu	Classic Estate
1976-1977	Chevrolet	Malibu	Classic Landau
1977	Chevrolet	Malibu	Classic Sport
1973-1974	Chevrolet	Malibu	Estate
1976	Chevrolet	Malibu	Landau
1977	Chevrolet	Malibu	Sport
1973-1974	Chevrolet	Monte Carlo	Base
1973-1974,1976	Chevrolet	Monte Carlo	Landau
1973,1975-1977	Chevrolet	Monte Carlo	S
1973-1977	GMC	Sprint	Base
1975-1977	GMC	Sprint	Classic
1973-1974	GMC	Sprint	Custom
1975	GMC	Sprint	High Sierra
1976	GMC	Sprint	Sierra Madre Del Sur
1975-1976	GMC	Sprint	SP
1975,1977	Oldsmobile	Cutlass	442
1973-1975	Oldsmobile	Cutlass	Base
1977	Oldsmobile	Cutlass	Colonnade
1976-1977	Oldsmobile	Cutlass	Colonnade S
1973-1977	Oldsmobile	Cutlass	S
1976-1977	Oldsmobile	Cutlass	Vista Cruiser
1973-1977	Oldsmobile	Cutlass Supreme	Base
1977	Oldsmobile	Cutlass Supreme	Brougham
1976-1977	Oldsmobile	Cutlass Supreme	Colonnade
1974-1975	Oldsmobile	Cutlass Supreme	Cruiser
1975	Oldsmobile	Cutlass Supreme	Hurst
1973-1975	Pontiac	Grand Am	Base
1973-1974,1976-1977	Pontiac	Grand Prix	Base
1975,1977	Pontiac	Grand Prix	LJ
1975-1977	Pontiac	Grand Prix	SJ
1973-1977	Pontiac	LeMans	Base
1973-1974	Pontiac	LeMans	Luxury
1973-1975,1977	Pontiac	LeMans	Safari
1974	Pontiac	LeMans	Safari Luxury
1973-1977	Pontiac	LeMans	Sport

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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!