QA1 78-96 GM B-Body Pro Rear Coil-Over System - Double Adj. - 12in x 200lbs/in - Aluminum - RCK52379

QA1 offers bolt-in Rear Coil-Over Conversion Kits for 1978-1996 GM B-Bodies. These kits include specially designed USA made mounting brackets and single or double adjustable aluminum shocks, springs and all necessary hardware. Single adjustable shocks provide 18 positions of simultaneous rebound and compression adjustment while QA1's double adjustable shocks provide 18 positions of compression adjustment and 18 positions of rebound adjustment, for a total of 324 possible valving combinations. 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. With our highly popular adjustable front coil-over kits and the addition of the rear coil-over conversion kit, you can now get a complete suspension makeover for both ends of the vehicle. Made in the U.S.A., Easy, Bolt-In Installation, No Cutting or Welding, Coil-Over, Ride Height Adjustable, 100% Dyno Tested and Serialized, Rebuildable and Revalveable by the QA1 Factory or QA1 Authorized Service Centers, Kit Will Lower the Vehicle, Conversion Kit Note: Later model vehicles tend to weigh more on average. Please take this into account when ordering springs. Call QA1 tech at 952.985.5675 for questions. Pro Coil Systems include:, 2 Shocks, 2 High Travel Springs, All Mounting Brackets and Hardware.

This Part Fits:

Year	Make	Model	Submodel
1978-1983	Buick	Estate Wagon	Base
1978-1981	Buick	LeSabre	Base
1985	Buick	LeSabre	Collector's Edition
1978,1982-1985	Buick	LeSabre	Custom
1985	Buick	LeSabre	Estate Wagon
1979-1985	Buick	LeSabre	Limited
1982	Buick	LeSabre	Limited Edition F/E
1978-1981	Buick	LeSabre	Sport
1992-1995	Buick	Roadmaster	Base
1996	Buick	Roadmaster	Collector's Edition
1991-1995	Buick	Roadmaster	Estate Wagon
1996	Buick	Roadmaster	Estate Wagon Collector's Edition
1992-1995	Buick	Roadmaster	Limited
1996	Buick	Roadmaster	Limited Collector's Edition
1986-1992	Chevrolet	Caprice	Base
1978-1996	Chevrolet	Caprice	Classic
1986-1990	Chevrolet	Caprice	Classic Brougham
1978,1981-1982	Chevrolet	Caprice	Classic Estate
1978-1981	Chevrolet	Caprice	Classic Landau
1993-1994	Chevrolet	Caprice	Classic LS
1987-1990	Chevrolet	Caprice	Classic LS Brougham
1991-1993	Chevrolet	Caprice	Classic LTZ
1979-1980	Chevrolet	Caprice	Classic Sport
1978-1985	Chevrolet	Impala	Base
1981-1982	Chevrolet	Impala	Estate
1978-1979	Chevrolet	Impala	Landau
1979-1980	Chevrolet	Impala	Sport
1994-1996	Chevrolet	Impala	SS
1978-1992	Oldsmobile	Custom Cruiser	Base
1978-1983	Oldsmobile	Delta 88	Base
1980-1981	Oldsmobile	Delta 88	Holiday
1978-1985	Oldsmobile	Delta 88	Royale
1980-1985	Oldsmobile	Delta 88	Royale Brougham
1984-1985	Oldsmobile	Delta 88	Royale Brougham LS
1978-1981	Pontiac	Bonneville	Base
1978-1981	Pontiac	Bonneville	Brougham
1978-1981	Pontiac	Bonneville	Safari
1978-1981	Pontiac	Catalina	Base
1978-1981	Pontiac	Catalina	Safari
1983-1986	Pontiac	Parisienne	Base
1983-1986	Pontiac	Parisienne	Brougham
1987-1989	Pontiac	Safari	Base

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 Drivershafts-

​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.​

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