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QA1 RCK52339 Rear Pro Coil Single-Adjustable Coilover Conversion Kit with 130 lb Springs

(Pontiac GTO 1964-72, LeMans 1964-72, Tempest 1964-70; Chevrolet Chevelle 1964-72, El Camino 1964-72; Oldsmobile Cutlass 1964-72, 442 1964-71 + 5 more models)

Manufacturer

Picture for manufacturer QA1 Precision Products

Part Number

RCK52339
7 reviews
Sale Price

$926.95

Estimated ship date Saturday, November 21

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Fitment guaranteed

Fitment guaranteed

Product Details

The QA1 RCK52339 is a complete bolt-in rear coilover conversion kit designed for 1964–1972 GM A-Body vehicles including the Chevelle, GTO, and Oldsmobile 442. This kit replaces the factory rear suspension with a performance coilover system, delivering improved stance, ride quality, and handling without cutting or welding.

The heart of the system is a pair of single-adjustable Proma Star aluminum coilover shocks featuring a fully threaded body for precise ride height adjustment. The threaded design allows for up to 1/2" higher than stock or up to 2.25" lower than stock, making it easy to dial in the perfect stance. The 18-click simultaneous rebound and compression adjustment lets you fine-tune the suspension for street cruising, autocross, drag racing, or road course use.

Included 12-inch conical springs are rated at 130 lb/in — a soft rate well suited to street-driven builds where ride comfort is a priority. The conical spring design places the upper end in the factory spring bucket in the frame, allowing for a longer, lighter spring with more stored energy and improved weight transfer.

Kit Includes:

  • 2 single-adjustable Proma Star aluminum coilover shocks (18-click simultaneous rebound/compression adjustment)
  • 2 conical 130 lb/in springs (12 in. free length)
  • Specially designed USA-made mounting brackets
  • All necessary hardware for complete installation

Key Features:

  • Bolt-in installation — no cutting or welding required
  • Fully threaded aluminum shock body for ride height adjustability
  • 18 positions of simultaneous rebound and compression adjustment
  • 100% dyno tested, serialized, serviceable, and rebuildable
  • Compatible with street, drag, autocross, and road racing applications
  • Proudly made in the USA in Lakeville, Minnesota
  • Single-adjustable shocks covered by QA1's Limited Lifetime Warranty

Note: Lower shock mount bracket may not be compatible with aftermarket rear end housings. Sold as a complete pair. Spring rate selection should account for vehicle weight — later or heavier builds may benefit from a higher spring rate.

Products specifications

Fits

Pontiac GTO 1964-72, LeMans 1964-72, Tempest 1964-70; Chevrolet Chevelle 1964-72, El Camino 1964-72; Oldsmobile Cutlass 1964-72, 442 1964-71, Vista Cruiser 1964-72; Buick Skylark 1964-72, Special 1964-69, Gran Sport 1965-67; GMC Sprint 1971-72

Adjustable Mounting Bracket Included

No

Adjustable Valving

Yes

Bushing Color

Natural

Bushing Material

Spherical bearing

Coil-Over Kit Position

Rear

Coil-Over Springs Included

Yes

Crossmember Included

No

Gas Charged

No

Lower Mount

Eyelet

Number of Valving Selections

12

Quantity

Sold as a kit.

Shock Body Finish

Clear anodized

Shock Body Material

Aluminum

Shocks Included

Yes

Spring Finish

Silver powdercoated

Spring Rate (lbs/in)

130 lbs./in.

Spring Rate/In

130 (Soft)

Upper Mount

Eyelet

Welding Required

Yes

Prop 65

WARNING: Cancer and Reproductive Harm. www.P65Warnings.ca.gov

Title

QA1 Shock Absorber and Coil Spring Assembly RCK52339

Fast Shipping. Good packaging. Very good pricing. Will shop from again.

Great price and received item in a timely and in great condition. Will definitely shop here again!

After searching for the best prices for the product that I wanted, I ended up with Autoplicity. I quickly got a response that my product has just been shipped and I am very impressed that Autoplicity is giving me an incentive to write a review on them. This tells me that this company is very concerned with the satisfaction of their customers. I am currently waiting for the order to arrive, but so far, I am extremely confident and happy with Autoplicity!

love it

Customer Care took care of my return and refunded the shipping after there was some order confusion. Thank you for taking care of everything!

Wow that was fast. I ordered a Pertronix Ignitor conversion kit. Not only were they by far the lowest price I could find, they shipped within hours of submitting the order. I got the shipment in less than 24 hrs, even though I ordered ground shipping. I was a little bummed that they did not offer free shipping, as I am used to with other online places, but with their fast turnaround, I am not begrudging it. Sure it might have been because they have a warehouse nearby, but it was still unexpectedly impressive. The part arrived and looks like it all there and should be good to go. <br><br>I can't vouch for their customer service, but so far I am pleasantly surprised.

My Superchips Cortex arrived within a few days of order and by far was the best price arround. Product arrived in perfect condition and worked as described. Great deal. Order #10984

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