SKU: 94640134822

QA1 GM Pro Front Coil-Over System - Double Adj. - 10in x 400lbs/in - Pigtail - Aluminum

$768.15 $853.50
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Ships within 48 hours · Estimated delivery Aug 1 - Aug 6

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Description

QA1 GM Pro Front Coil-Over System - Double Adj. - 10in x 400lbs/in - Pigtail - AluminumThese QA1 GM Pro Coil Systems are a great option for anyone looking for fully adjustable ride height and valving control. Choose a spring rate and adjustability that fits your driving style, adjust the valving to match and you are on your way. 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

These QA1 GM Pro Coil Systems are a great option for anyone looking for fully adjustable ride height and valving control. Choose a spring rate and adjustability that fits your driving style, adjust the valving to match and you are on your way. 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. Adjustable Pro Coil System Features: Available in independent compression and rebound double adjustable, simultaneous compression and rebound adjustable, or drag "R" Series adjustable, Lightweight Billet Aluminum Coil-Over Shocks, High Travel Springs, Easy, Bolt-In Installation, Ride Height Adjustable, 100% Dyno Tested and Serialized, Serviceable and Rebuildable by QA1 Authorized Service Centers, Made in the USA, Used in drag racing, street performance, autocross, road racing and street rod applications, Sold in Pairs, Non-Adjustable Pro Coil System Features: Steel, Stock Appearing Coil-Over Shocks, High Travel Springs, Easy, Bolt-In Installation, Ride Height Adjustable, Used in drag racing, street performance, autocross, road racing and street rod applications, Sold in Pairs

  • Achieve the ultimate balance of ride quality and performance handling with independent tuning of rebound and compression valving.
  • Easy bolt-in installation that works with your factory or upgraded QA1 tubular control arms.
  • Up to 2 of ride height adjustment allows you to dial in the perfect stance.
  • Limited Lifetime Warranty for peace of mind.
  • Proudly made in the USA

This Part Fits:

Year Make Model Submodel
1965-1967 Buick Gran Sport Base
1964-1967 Buick Skylark Base
1964-1967 Buick Special Base
1964-1967 Buick Special Deluxe
1956-1957 Chevrolet Bel Air Base
1956 Chevrolet Bel Air Beauville
1956-1957 Chevrolet Bel Air Nomad
1964-1967 Chevrolet Chevelle 300
1965-1967 Chevrolet Chevelle 300 Deluxe
1967 Chevrolet Chevelle Concours
1967 Chevrolet Chevelle Malibu
1964-1965 Chevrolet Chevelle Malibu Super Sport
1967 Chevrolet Chevelle SS 396
1966 Chevrolet Chevelle Super Sport 396
1964-1967 Chevrolet El Camino Base
1955-1957 Chevrolet Truck 3100
1955-1957 Chevrolet Truck 3200
1955-1957 Chevrolet Truck 3400
1955-1957 Chevrolet Truck 3500
1955-1957 Chevrolet Truck 3600
1955-1957 Chevrolet Truck 3700
1955-1957 Chevrolet Truck 3800
1955-1957 Chevrolet Truck Base
1955-1957 Chevrolet Two-Ten Series Base
1955-1957 Chevrolet Two-Ten Series Del Ray
1964-1967 Oldsmobile 442 Base
1964-1967 Oldsmobile Cutlass Base
1964-1967 Oldsmobile Cutlass Holiday
1967 Oldsmobile Cutlass Turnpike Cruiser
1964-1967 Oldsmobile Vista Cruiser Base
1964-1967 Oldsmobile Vista Cruiser Custom
1964-1967 Pontiac GTO Base
1964-1967 Pontiac LeMans Base
1964-1967 Pontiac Tempest Base
1964-1967 Pontiac Tempest Custom
1964-1967 Pontiac Tempest Safari
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 94640134822

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4.2 ★★★★★
Based on 20 reviews
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Product Reviews
A
Verified Purchase
A.U.
Whiting, US
★★★★★ 5
It works!
Size: 1 Count (Pack of 1)
My 2005 Jetta failed the inspection and my mechanic said (after clearing the engine light) that I should drive the car for 20 min highway and 20 local. We've tried that the whole day but out of three lights on his device only 1 went away. Next day the light engine came back. After not being happy with the explanation offered by him (a family friend) that I should keep driving it until we get lucky I went online and found CRC 05063. Followed the instruction (one bottle on full tank of gas). Before my tank was under 3/4, engine light went off!! At half tank I went and did the inspection - IT PASSED! I am really impressed! Update August 2015! I have been using this product for 2-3 years now and if it is not working for you please read. In July I have used the first bottle and took my 2005 Jetta for inspection. It failed. Ordered a second bottle and it failed again. My mechanic said keep driving. Did 200 miles in one day and nothing. Decided to take matters in my own hands and ordered Autel MaxiScan MS300 ($18, it allows you to read and delete codes). There were two faults - EVAP and 2nd something about Oxygen. Went online and this is the first time I heard about driving cycles. These are steps that you have to follow so that your car's computer can start measuring all the parameters needed for the test. Driving cycles are not exact science but I tried to follow the instructions as much as I could and after just 20 minutes (10min city and 10min highway) ALL the parameters were set and I passed the emission test with flying colors! So, just before you give a comment about CRC like "tried and didn't work" be aware that there are other things you have to take into account.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 1, 2013
C
Verified Purchase
Colleen Milakovich
San Leandro, US
★★★★★ 3
My car did not pass!
Size: 1 Count (Pack of 1)
My car didn't pass. However, the company CRC sent me a reimbursement check.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 21, 2026
R
Verified Purchase
RON HAGGIN
Lowell, US
★★★★★ 5
Pass Again
Size: 1 Count (Pack of 1)
This product never fails (no pun intended), I have been using this for the last 10 years my car has never failed a smog test. I highly recommend this and that you use it correctly. You will not be disappointed.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 27, 2026
N
Verified Purchase
NightOwl007
Alexandria, US
★★★★★ 5
Really Helps-Especially for Star Station Tests-Haven’t Failed Since Using in Two Older Vehicles
Size: 1 Count (Pack of 1)
Ever since the new CA State mandate that older cars and trucks have to go to a Star Emissions Station for their smog check I have become very familiar with Guaranteed to Pass. The first year of getting smogged under the new regulations my 1995 truck barely failed. It’s a tougher series of tests and it really sucks to have to pay more for a smog test that is designed to get older cars and trucks off the road that would normally pass a regular smog check. It came at a bad time, having just been laid off and losing my health insurance and income and trying to figure how to come up with money for truck repairs to get my registration renewed so I could be a viable job candidate in the really bad job market of a few years back (and still today, may I add.) But that is a whole other issue that gets my blood boiling. So back to my experience with Guaranteed to Pass. My 1995 Ford Truck barely failed and I mean barely according to the emission numbers so I had the manifold cleaned out, used premium gas for a tank and added Guaranteed to Pass. Having two gas tanks was handy as I could switch the tank to a fresh tank without the remainder of the additive in it for the retest. It passed with flying colors. So for our other older 1993 mini-van and the truck in the few successive years since I always run the premium gas with Guaranteed to Pass in the tanks before the smog check. We’ve had the van and truck tested 3-4 times combined since and they pass every time. So I’m sold on Guaranteed to Pass and will vouch for it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 14, 2016
M
Verified Purchase
Muy buenos, pero….
Grantham, US
★★★★★ 5
Excellent quality
Color: Black
Fits perfectly to my bmw x3 2017 2.0L
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 16, 2026

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