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QA1 rear coil-over conversion kit for GM B-Body full view
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QA1 78-96 GM B-Body Pro Rear Coil-Over System - Single Adj. - 12in x 300lbs/in - Aluminum

QA1
QAPRCK52385
806990147448
Coilovers
2 Units In Stock - Ships Next Business Day
$ 982.60 $ 886.95
$ 886.95

SKU: RCK52385   |   UPC: 806990147448

QA1 78-96 GM B-Body Pro Rear Coil-Over System - Single Adjustable - 12" x 300 lb/in - Aluminum

The QA1 RCK52385 Pro Rear Coil-Over Conversion System is the ultimate bolt-in upgrade for your 1978-1996 GM B-Body (Caprice, Impala, etc.). This complete system replaces the factory leaf springs with modern single-adjustable aluminum coil-overs featuring 300 lb/in springs, delivering 2.5" to 5.5" of adjustable rear drop, vastly improved ride quality, and superior handling. The single-adjustable shocks offer 18 positions of simultaneous rebound and compression adjustment, while the fully threaded body allows precise ride height tuning for the perfect stance or weight balance. Lightweight high-travel springs and precision-machined aluminum components reduce unsprung weight and provide consistent performance from street cruising to weekend track days.

Key Features

  • Single Adjustable Shocks: 18 positions of simultaneous rebound & compression adjustment
  • 300 lb/in High-Travel Springs: Medium rate optimized for most street and performance B-Body builds
  • 12" Spring Length: Ideal for lowered applications with excellent travel
  • Fully Threaded Aluminum Body: Easy ride height adjustment from 2.5" to 5.5" drop
  • Bolt-In Design: Direct replacement for factory leaf springs no cutting or welding
  • Lightweight & Durable: Reduces unsprung weight while maintaining strength

Specifications

Specification Detail
Part Number RCK52385
Position Rear
Shock Type Single Adjustable Aluminum Coil-Over
Spring Rate 300 lb/in
Spring Length 12"
Drop Range 2.5" - 5.5"
Compatibility 1978-1996 GM B-Body (Chevrolet Caprice, Impala, Buick, Oldsmobile, Pontiac)
Installation Bolt-On Coil-Over Conversion
Country of Origin United States
Warranty Limited Lifetime (QA1)
Shipping Weight Approx. 55-65 lbs

What's Included

  • Pair of QA1 Single Adjustable Aluminum Rear Coil-Over Shocks
  • Pair of 12" x 300 lb/in High-Travel Springs
  • Specially Designed USA-Made Mounting Brackets
  • All Necessary Hardware & U-Bolts
  • Detailed Installation Instructions

Product Notes

  • Designed for 1978-1996 GM B-Body vehicles (Caprice, Impala, etc.)
  • Later model B-Bodies tend to weigh more contact QA1 tech for spring rate questions
  • Professional installation and rear alignment recommended

Installation Notes

  • Estimated time: 6-10 hours, moderate to advanced difficulty
  • Bolt-on conversion removes factory leaf springs and installs coil-overs
  • Full rear alignment and driveline angle check required after installation

This Part Fits

Year Make Model Notes
1978 to 1996 Chevrolet Caprice / Impala All B-Body Configurations (Sedan, Wagon)
1978 to 1996 Buick LeSabre / Roadmaster B-Body Models
1978 to 1996 Oldsmobile Delta 88 / Ninety-Eight B-Body Models
1978 to 1996 Pontiac Bonneville / Parisienne B-Body Models

Why Choose QA1 Rear Coil-Over Conversion System?

  • Modern coil-over performance with classic B-Body styling and stance
  • Full adjustability for the perfect ride height and handling balance
  • Premium QA1 quality with lifetime warranty confidence

Frequently Asked Questions

  • Q: Will this kit fit my 1995 Chevrolet Caprice?
    A: Yes, RCK52385 is a direct fit for all 1978-1996 GM B-Body vehicles.
  • Q: What spring rate is included?
    A: 300 lb/in medium rate ideal for most street-driven B-Bodies.
  • Q: Is an alignment required?
    A: Yes, a full rear alignment is required after installation.
  • Q: What is the warranty?
    A: Covered by QA1’s limited lifetime warranty.

Shipping & Handling

  • Method: UPS / FedEx Ground (Oversize)
  • Availability: In stock ships same or next business day
  • Packaging: Secure protective packaging
  • Weight: Approx. 55-65 lbs

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