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Vehicle Info NeededQA1PART NUMBER: 122-GD507-11250C
Pro Coil Front Coil-Over System Double Adjustable Shock
$96495
Ships on 09/08/2026
Lowest Price GuaranteeSpring Style "C"1971-96 Impala
- Pro Coil Front Coil-Over System
- Double Adjustable Shock
- 9.63'' Compressed / 14.50'' Extended Shock Height
- 11'' Spring Free Length
- 1500-1600 lbs. Front End Weight
- 250 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
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 Height6.0
Package Width10.0
Package Length25.0
Weight28.48 PG
Part CategoryPerformance Parts
Part FitmentDirect Fit
Vendor Part NumberGD507-11250C
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
