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Vehicle Info NeededQA1PART NUMBER: 122-GD501-10400A
Pro Coil Front Coil-Over System Double Adjustable Shock
$96495
Ships on 09/14/2026
Lowest Price GuaranteeSpring Style ''A''1955-1957 Chevy Car 1964-1967 Chevelle / Malibu / El Camino 1964-1967 Skylark (including GS) 1964-1967 Cutlass / 442 / F85 1964-1967 GTO / Cutlass / LeMans
- Pro Coil Front Coil-Over System
- Double Adjustable Shock
- 10.5'' Compressed / 15'' Extended Shock Height
- 10'' Spring Free Length
- 1801-1900 lbs. Front End Weight
- 400 lbs/in. Spring Rate
Features: - Truly independent compression and rebound adjustment.
- 18 positions of rebound on one knob and 18 positions of compression on the other knob, providing 324 valving options.
- One shock allows for the ultimate in fine-tuning for any application. Shock Mount Type:
- Stud Type Upper Mount
- T-Bar Type Lower Mount
*Notes: Some front applications may require the lower a-arm to be dropped for installation. Body diameter may be too large to allow mounting from the bottom. Some control arm's shock openings may need to be enlarged to accept a QA1 shock.
Stud mounts are measured to the shoulder of the stud. Add 13/16' for installed compressed length per stud mount. Loops and t-bars are measured to the center of the loop. Lengths may vary slightly.
Optimize Performance with a Replacement Coil-Over Conversion
QA1 Double-Adjustable Pro Coil Systems are ideal for anyone looking for a suspension upgrade that allows for fully-adjustable ride height and valving control while maintaining stock configuration control arms. Choose a spring rate that fits your driving style and provides the stance you want, while offering increased weight transfer, greater durability, and easy bolt-on installation.
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GM Pro Coil Coil Over Conversion Kits are also available in Single Adjustable and Drag Race "R" Series
 Spring Style ''A'' Pigtail End 3.50'' Upper ID 2.50'' Lower ID |  Spring Style ''B'' Flat End 3.50'' Upper ID 2.50'' Lower ID |  Spring Style ''C'' Flat End 4.10'' Upper ID 2.50'' Lower ID |
Part TypeShock Absorber and Coil Spring Assembly
Product LineQA1 GM Pro Coil Double Adjustable Coil-Over Conversion Systems
BrandQA1
Package Height8.3
Package Width10.0
Package Length21.3
Weight20.6 PG
Part CategoryPerformance Parts
Adjustable ValvingYes
Hardware IncludedYes
Number Of Valving Selections324
Gas ChargedNo
Crossmember IncludedNo
Bushing ColorBlack
Suspension Height Adjustment (In.)0.0-2.0 lowered front
Lower MountTie bar
Shock Body FinishClear anodized
Shock Body MaterialAluminum
Body Diameter2 in (50.8 mm)
Extended Length15 in (381 mm)
Coil-Over Springs IncludedYes
Spring Rate400 lbs./in.
Bushing MaterialPolyurethane
Adjustable Mounting Bracket IncludedNo
Recommended Front-End Weight1,801-1,900 lbs
Spring FinishSilver powdercoated
Welding RequiredNo
QuantitySold as a kit
Coil-Over Kit PositionFront
Upper MountStud
Shocks IncludedYes
Threaded Adjustment Range6 in (152.4 mm)
Part FitmentDirect Fit
Collapsed Length10.5 in (266.7 mm)
Vendor Part NumberGD501-10400A
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
