73-77 GM A-Body Rear Pro Coil System

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$732.43
73-77 GM A-Body Rear Coil-Over Conversion Kits73-77 GM A-Body Rear Coil-Over Conversion Kits
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  • 73-77 GM A-Body Rear Coil-Over Conversion Kits
  • 73-77 GM A-Body Rear Coil-Over Conversion Kits - MOD™ Series Adjustable
  • 73-77 GM A-Body Rear Coil-Over Conversion Kits - Double Adjustable
  • 73-77 GM A-Body Rear Coil-Over Conversion Kits - Single Adjustable

1973-1977 Chevelle, Monte Carlo, Cutlass & Regal Rear Coil-Over Conversion Kits

QA1 offers bolt-in Rear Coil-Over Conversion Kits for 1973-1977 GM A-Bodies. These kits include specially designed USA made mounting brackets and single, double, or MOD™ Series 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. MOD™ Series shocks also feature a double adjustable design but include adjustable low-speed bleed as well for fully independent control over compression and rebound characteristics.

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

 

Additional MOD™ Series Features:

  • Features QuickTune™ technology - modular valve packs that allow for completely revalving the shock without having to remove it from the car!
  • 24 click independent compression and rebound adjustment with low-speed bleed
  • Large solid piston (with blow-off valve) for improved driver feel and control with up to 1,600 lb. force
  • High-speed valving adjustment (coarse adjustment)—relates to shock operation during impact events, like hitting a pothole or curb 
  • Low-speed valving (fine-tune adjustments)—adjusts ride quality and weight transfer on corner entry/exit; more bleed for softer feel and less bleed for stiffer feel
  • Indexable base eyelet—multiple mounting positions to optimize knob access and provide more mounting flexibility
  • Thrust bearings included

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

Installation instructions for 73-77 GM A-Body Rear Pro Coil System

MOD™ Series Shock Installation and Quick Tuning Guide

Spanner wrenches and thrust bearing kits sold seperately

SPRING RATE CHART
The chart below is a general guideline for selecting spring rates for QA1's Rear Pro Coil Shock Systems for 73-77 GM A-Bodies. Spring rates may vary depending on applications, usage and personal preference.

SoftMediumFirm
170 200 220

AVERAGE VEHICLE WEIGHT
See our detailed Spring Rate Chart with Vehicle Weights for general guidelines on determining the approximate weight of popular vehicles and which spring rates work best for them.

QA1's Rear Coil-Over Conversion Kits

 

Assembling a QA1 Coil-Over Shock Kit

 

Change Ride Height & Valving on Single Adjustable Coil-Over Shocks

Part Numbers
Ride FeelingMOD™ Series AdjustableDouble AdjustableSingle Adjustable
Soft RCK52444 RCK52371 RCK52375
Medium RCK52445 RCK52372 RCK52376
Firm RCK52446 RCK52373 RCK52377

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