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Vehicle Info NeededQA1PART NUMBER: 122-GD501-10550C
Pro Coil Front Coil-Over System Double Adjustable Shock
$96495
Ships on 09/14/2026
Lowest Price GuaranteeSpring Style "C"1970-1981 Camaro / Firebird
- Pro Coil Front Coil-Over System
- Double Adjustable Shock
- 10.5'' Compressed / 15'' Extended Shock Height
- 10'' Spring Free Length
- 2101-2300 lbs. Front End Weight
- 550 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 Height8.6
Package Width10.3
Package Length21.6
Weight25.19 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 MountBar pin
Shock Body FinishClear anodized
Shock Body MaterialAluminum
Extended Length17 in (431.8 mm)
Coil-Over Springs IncludedYes
Spring Rate550 lbs./in.
Bushing MaterialPolyurethane
Adjustable Mounting Bracket IncludedNo
Spring FinishSilver powdercoated
Recommended Front-End Weight (Lbs.)2,101-2,300
Welding RequiredNo
QuantitySold as a kit
Coil-Over Kit PositionFront
Upper MountStud
Shocks IncludedYes
Threaded Adjustment Range3 in (76.2 mm)
Part FitmentDirect Fit
Collapsed Length11.63 in (295.402 mm)
Internal DesignTwin-tube
Vendor Part NumberGD501-10550C
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
