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-QA1 GM Pro Front Coil-Over System - Single Adj. - 10in x 550lbs/in - Flat - Aluminum-Coilovers-QA1
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QA1 GM Pro Front Coil-Over System - Single Adj. - 10in x 550lbs/in - Flat - Aluminum

QA1
QAPGS401-10550B
806990062116
Coilovers
Out of stock
$ 830.83 $ 749.95

SKU: GS401-10550B | UPC: 806990062116

QA1 GM Pro Front Coil-Over System - Single Adj. - 10in x 550lbs/in - Flat - Aluminum for 1964-1972 GM A-Body

QA1 GS401-10550B front coil-over assembly upgrades 1964-1972 Chevrolet Chevelle, Pontiac GTO, El Camino, Buick Skylark, Oldsmobile 442, Cutlass, and other GM A-body vehicles with single adjustable valving and precise ride height tuning. This pair features 10 inch 550 lb/in high-travel springs with flat tapered ends, aluminum billet shock body, 10.13 inch compressed length, and 14 inch extended length for bolt-in performance gains in drag racing, street driving, autocross, and road racing. Threaded spring perch allows simple adjustments to match driving style and optimize handling balance.

Key Features

  • Single Adjustable Valving: Tune compression damping to suit street cruise, drag launches, or track corners with 18 clicks of adjustment for responsive control
  • Ride Height Adjustable: Fully threaded aluminum body and spring perch provide 2-3 inches of drop potential without altering bumpsteer or alignment
  • High Travel Springs: Lightweight American-made coils with fewer windings and thinner wire deliver more suspension travel, quicker response, and reduced unsprung weight
  • Billet Aluminum Construction: Durable lightweight shocks cut mass over stock components for sharper steering and faster weight transfer
  • Dyno Tested and Serialized: Each unit 100% tested at QA1 factory with unique serial number, rebuildable at authorized centers for long-term reliability

Product Notes

  • Sold as complete left and right pair for front installation
  • Requires factory stock upper and lower control arm mounts
  • Box dimensions 21 x 11 x 11 inches, product weight 19.2 lbs

Installation Notes

  • Professional installation recommended.
  • Bolt-in design uses OEM mounting holes, no fabrication needed for most A-body chassis
  • Verify spring rate matches vehicle weight and tire setup, preload to factory ride height specs

This Part Fits

Year Make Model Submodel
1968-1969 Pontiac Tempest Custom
1970 Pontiac Tempest GT
1968-1969 Pontiac Tempest Safari
1968-1972 Chevrolet Chevelle Concours
1969-1972 Chevrolet Chevelle Concours Estate
1969-1972 Chevrolet Chevelle Greenbrier
1968-1972 Chevrolet Chevelle Malibu
1968-1972 Chevrolet Chevelle Nomad
1968-1972 Chevrolet Chevelle SS
1968-1972 Chevrolet El Camino Custom
1968-1972 Chevrolet El Camino SS
1971-1972 GMC Sprint Base
1972 GMC Sprint Custom
1968-1971 Oldsmobile 442 Base
1968-1972 Oldsmobile Cutlass Base
1972 Oldsmobile Cutlass Cruiser
1968 Oldsmobile Cutlass S
1968-1972 Oldsmobile Vista Cruiser Base
1968-1972 Pontiac GTO Base
1970-1971 Pontiac GTO The Judge
1968-1972 Pontiac LeMans Base
1972 Pontiac LeMans Luxury
1969-1970 Pontiac LeMans Safari
1970-1972 Pontiac LeMans Sport
1971 Pontiac LeMans T37
1970 Buick Skylark 350
1972 Buick Skylark 350
1968-1972 Buick Skylark Base
1968-1972 Buick Skylark Custom
1968-1969 Buick Special Base
1968 Chevrolet Chevelle 300
1968-1969 Chevrolet Chevelle 300 Deluxe
1968 Chevrolet Chevelle Base

Why Choose QA1?

  • Over 30 years leading motorsports suspension since 1993 with rod ends, bearings, and shocks
  • 83,000 sq ft Lakeville MN factory produces dyno-tested components for racing and street
  • Proven in drag, circle track, autocross, road race, and street rod applications worldwide

Frequently Asked Questions

  • Q: Will this fit my 1966 Chevelle?
    A: Yes, GS401-10550B fits all 1964-1972 GM A-body vehicles including early Chevelles using stock front mounts
  • Q: What materials are used in construction?
    A: Billet aluminum shock body, high-strength steel internals, and lightweight steel high-travel springs designed for durability and reduced weight
  • Q: What is the warranty and service process?
    A: Backed by QA1 limited lifetime warranty on manufacturing defects, fully rebuildable at authorized service centers across the US

Shipping & Handling

  • Method: UPS or FedEx Ground
  • Availability: In stock - ships same or next business day
  • Packaging: Securely boxed 21 x 11 x 11 inches
  • Weight: 19.2 lbs

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