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QA1 1978-1996 GM B-Body Pro Rear Coil-Over System - Double Adjustable - 12in x 250lbs/in Aluminum RCK52380

$1,109.95 $1,229.65
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QA1 1978-1996 GM B-Body Pro Rear Coil-Over System - Double Adjustable - 12in x 250lbs/in Aluminum RCK52380
$1,109.95 $1,229.65
$1,109.95 $1,229.65

Fits select 1978-1996 GM B-Body models including Chevrolet Caprice and Impala, Buick Roadmaster and LeSabre, Oldsmobile Delta 88, and Pontiac Bonneville.

Transform your vehicle's handling and stance with the QA1 Pro Rear Coil-Over Conversion System. This bolt-in kit replaces factory shocks and springs with a fully adjustable performance setup designed to improve weight balance and suspension response. The double-adjustable aluminum shocks feature 18 positions of independent compression and rebound adjustment, providing 324 unique valving combinations to bridge the gap between street comfort and track performance.

The system includes American-made, lightweight high-travel springs with a 250 lbs/in rate. These springs utilize fewer coils and a smaller wire diameter to increase travel and reduce unsprung weight. With a fully threaded shock body, you can easily adjust your ride height from 0.5 inches higher than stock to 2.25 inches lower than stock to achieve the perfect center of gravity.

  • Manufacturer Part Number: RCK52380
  • Double adjustable shocks with 324 valving combinations
  • 12-inch x 250 lbs/in high-travel springs
  • Lightweight, hard-anodized aluminum shock bodies
  • Ride height adjustable from +0.5" to -2.25"
  • 100% dyno tested and serialized
  • Rebuildable and revalveable by QA1 service centers
  • Complete bolt-in installation with no cutting or welding required
  • Includes 2 shocks, 2 springs, mounting brackets, and all necessary hardware
  • Limited Lifetime Warranty
🔧 Fitment & Compatibility
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

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