Free Shipping & Handling on Orders Over $95 - Order by 11pm EST for Same-Day Shipping!
0
My Cart
$0.00
Shop By
Category
All Categories

Rebates
Gift Certificates
My Account
E-Mail Signup
Catalog Request
Help

QA1 GS401-11250C

Pro Coil Front Coil-Over System Single Adjustable Shock



QA1 GS401-11250C
Representative Image
Product images may differ from actual product appearance.

Part Number: 122-GS401-11250C

Pro Coil Front Coil-Over System
  • Single Adjustable Shock
  • 9'' Compressed / 12.8'' Extended Shock Height
  • 11'' Spring Free Length
  • 1500-1600 lbs. Front End Weight
  • 250 lbs/in. Spring Rate
  • $467.99
    Ships
    FREE Shipping
    QA1 GS401-11250C Pro Coil Front Coil-Over System Single Adjustable Shock $467.99

    QA1 GS401-11250C Details

    Spring Style ''C''

  • 1973-1983 Chevelle / Malibu
  • 1975-1979 Nova / Omega / Skylark
  • 1973-87 El Camino / Regal / Cutlass Supreme / Grand Prix
  • 1973-1988 Monte Carlo
  • 1984-1987 Grand National
  • 1974-1977 GTO / Ventura
  • 1973-77 LeMans
  • 1982-2004 S10 Pickup

    Features:
  • Simultaneous compression and rebound adjustment on one knob
  • 18 valving options
  • Perfect for comfortable street driving or the firm handling of a more modern sports car

    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.

  • Specifications:

    Bushing Material
    Polyurethane
    Hardware Included
    Yes
    Gas Charged
    No
    Adjustable Mounting Bracket Included
    No
    Adjustable Valving
    Yes
    Bushing Color
    Black
    Coil-Over Kit Position
    Front
    Coil-Over Springs Included
    Yes
    Crossmember Included
    No
    Internal Design
    Twin-tube
    Number of Valving Selections
    18
    Quantity
    Sold as a kit
    Recommended Front-End Weight (lbs.)
    1,500-1,700
    Shock Body Finish
    Clear anodized
    Shock Body Material
    Aluminum
    Shocks Included
    Yes
    Spring Rate
    250 lbs./in.
    Suspension Height Adjustment
    Stock
    Welding Required
    No
    Spring Finish
    Silver powdercoated
    Manufacturer's Part Number:
    GS401-11250C

    Update Your GM Front End with a Stock Mount Coil-Over Conversion System from QA1!

    QA1 Single Adjustable Pro Coil Systems are great options for anyone looking for fully adjustable ride height and valving control while maintaining stock configuration control arms. Choose a spring rate that fits your driving style and adjust the valving to match, and you're on your way. This system is a great option for anyone looking for a suspension upgrade for their street car. With 18 valving options of simultaneous compression and rebound adjustment, the QA1 Single Adjustable Pro Coil System allows for that soft comfortable ride you want when cruising and the firm handling you'd expect from a more modern sports car.
    Made in the USA

    The Pro Coil System includes:
  • Two Proma Star single adjustable coil-over shocks
  • Two specially designed conical springs
  • All mounting hardware.

    Easy Bolt-In Installation - Minimal modifications to be made. Remove the existing shocks and springs and the QA1 Pro Coil System bolts right back in.

    Ride Height Adjustable - Threaded aluminum shock body allows ride height adjustment.

    Specially Designed Conical Springs - This spring is designed so that the lower end sets on the coil-over shock and the upper end sets in the original spring bucket in the frame. This allows for the use of a longer and lighter spring for more stored energy, offering increased weight transfer. Greater durability is also achieved by locating the spring pressure in the frame and not on a single stud.

    Features:
  • Easy, Bolt-In Installation - Stock Location Using Stock Mount
  • Lightweight Aluminum
  • Coil-Over Design
  • Ride Height Adjustable
  • 100% Dyno Tested and Serialized
  • Rebuildable and Revalveable Shocks





    GM Pro Coil Coil Over Conversion Kits are also available in Double 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

  • Does QA1 GS401-11250C fit your vehicle?

    Narrow Results

    1973 CHEVROLET EL CAMINO

    • CC: 6555
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8

    1974 PONTIAC GRAND AM

    • CC: 5733
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8

    1974 PONTIAC LEMANS

    • CC: 5733
    • Liter: 5.7
    • Aspiration: N
    • SubModel: SPORT
    • Engine Vin: A
    • CUI: 350
    • EngineType: V8

    1977 OLDSMOBILE CUTLASS SUPREME

    • Liter: 3.8
    • SubModel: BROUGHAM
    • CUI: 231
    • EngineType: V6

    1973 CHEVROLET MALIBU

    • CC: 6555
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8

    1980-1982 CHEVROLET MALIBU

    • Liter: 3.8
    • SubModel: CLASSIC
    • CUI: 229
    • EngineType: V6

    1973-1974 PONTIAC LEMANS

    • CC: 5737
    • Liter: 5.7
    • SubModel: SPORT
    • EngineType: V8

    1976 PONTIAC LEMANS

    • Liter: 7.5
    • SubModel: SPORT
    • CUI: 455
    • EngineType: V8

    1977 PONTIAC VENTURA

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8

    1976 PONTIAC LEMANS

    • Liter: 4.3
    • SubModel: BASE
    • CUI: 260
    • EngineType: V8

    1974 OLDSMOBILE CUTLASS

    • CC: 5737
    • Liter: 5.7
    • SubModel: S
    • EngineType: V8

    1974 BUICK CENTURY

    • CC: 7456
    • Liter: 7.5
    • Aspiration: N
    • SubModel: LUXUS
    • Engine Vin: R
    • CUI: 455
    • EngineType: V8

    1973 PONTIAC LEMANS

    • CC: 5733
    • Liter: 5.7
    • Aspiration: N
    • SubModel: SPORT
    • Engine Vin: M
    • CUI: 350
    • EngineType: V8

    1977 PONTIAC VENTURA

    • Liter: 4.9
    • SubModel: SJ
    • CUI: 301
    • EngineType: V8

    1977-1979 CHEVROLET NOVA

    • EngineType: V8
    • SubModel: BASE

    1980 CHEVROLET MALIBU

    • Liter: 5.7
    • SubModel: SPORT
    • CUI: 350
    • EngineType: V8

    1973 CHEVROLET LAGUNA

    • CC: 6555
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8

    1981 CHEVROLET MALIBU

    • EngineType: L6
    • SubModel: BASE

    1977 OLDSMOBILE CUTLASS SUPREME

    • Liter: 3.8
    • SubModel: BASE
    • CUI: 231
    • EngineType: V6

    1986-1988 CHEVROLET MONTE CARLO

    • EngineType: ALL
    • SubModel: LS

    1973 CHEVROLET CHEVELLE

    • EngineType: L6
    • SubModel: DELUXE

    1975-1976 CHEVROLET MALIBU

    • Liter: 5.7
    • SubModel: CLASSIC ESTATE
    • CUI: 350
    • EngineType: V8

    1974 CHEVROLET MALIBU

    • CC: 5736
    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: L
    • CUI: 350
    • EngineType: V8

    1975-1976 CHEVROLET NOVA

    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6

    1976 BUICK SKYLARK

    • Liter: 5.7
    • SubModel: S
    • CUI: 350
    • EngineType: V8

    1974 GMC SPRINT

    • CC: 6556
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8

    2000-2003 CHEVROLET S10 PICKUP

    • EngineType: ALL
    • SubModel: ALL

    1973-1974 PONTIAC LEMANS

    • CC: 5737
    • Liter: 5.7
    • SubModel: SAFARI
    • EngineType: V8

    1973-1974 OLDSMOBILE CUTLASS

    • CC: 7456
    • Liter: 7.5
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: U
    • CUI: 455
    • EngineType: V8

    1973 CHEVROLET MALIBU

    • Liter: 5.0
    • EngineType: V8
    • SubModel: ESTATE

    1976 PONTIAC LEMANS

    • Liter: 4.1
    • SubModel: SPORT
    • CUI: 250
    • EngineType: L6

    1973 CHEVROLET MALIBU

    • CC: 6555
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8

    1977 PONTIAC GRAND PRIX

    • Liter: 6.6
    • SubModel: BASE
    • CUI: 403
    • EngineType: V8

    1975-1976 OLDSMOBILE CUTLASS SUPREME

    • Liter: 7.5
    • SubModel: BASE
    • CUI: 455
    • EngineType: V8

    1978-1979 PONTIAC GRAND PRIX

    • Liter: 5.0
    • SubModel: LJ
    • CUI: 305
    • EngineType: V8

    1977 BUICK SKYLARK

    • EngineType: ALL
    • SubModel: ALL

    1976 CHEVROLET MALIBU

    • CC: 5031
    • Liter: 5.0
    • SubModel: CLASSIC
    • EngineType: V8

    1974 CHEVROLET MONTE CARLO

    • CC: 7439
    • Liter: 7.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: Y
    • CUI: 454
    • EngineType: V8

    1977 PONTIAC LEMANS

    • Liter: 6.6
    • SubModel: SPORT
    • CUI: 403
    • EngineType: V8

    1973-1974 PONTIAC GRAND PRIX

    • Liter: 7.5
    • EngineType: V8
    • SubModel: BASE

    1981 CHEVROLET MONTE CARLO

    • Liter: 4.4
    • SubModel: BASE
    • CUI: 267
    • EngineType: V8

    1973-1974 CHEVROLET MALIBU

    • EngineType: L6
    • SubModel: BASE

    1979 CHEVROLET MALIBU

    • EngineType: ALL
    • SubModel: POLICE

    1973 PONTIAC GRAND AM

    • CC: 5733
    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: M
    • CUI: 350
    • EngineType: V8

    1977 OLDSMOBILE CUTLASS SUPREME

    • Liter: 6.6
    • SubModel: BROUGHAM
    • CUI: 403
    • EngineType: V8

    1973 GMC SPRINT

    • Liter: 5.7
    • SubModel: CUSTOM
    • CUI: 350
    • EngineType: V8

    1973-1974 PONTIAC LEMANS

    • EngineType: ALL
    • SubModel: LUXURY

    1973 CHEVROLET CHEVELLE

    • CC: 7439
    • Liter: 7.4
    • Aspiration: N
    • SubModel: DELUXE
    • Engine Vin: Y
    • CUI: 454
    • EngineType: V8

    1981 PONTIAC GRAND PRIX

    • CC: 3800
    • Liter: 3.8
    • SubModel: LJ
    • CUI: 231
    • EngineType: V6

    1973-1974 PONTIAC LEMANS

    • CC: 6555
    • Liter: 6.6
    • SubModel: SAFARI
    • CUI: 400
    • EngineType: V8

    1981 PONTIAC LEMANS

    • Liter: 4.9
    • SubModel: SAFARI
    • CUI: 301
    • EngineType: V8

    1974 PONTIAC LEMANS

    • CC: 5733
    • Liter: 5.7
    • SubModel: SPORT
    • CUI: 350
    • EngineType: V8

    1975-1976 CHEVROLET MALIBU

    • Liter: 6.6
    • SubModel: CLASSIC ESTATE
    • CUI: 400
    • EngineType: V8

    1974 PONTIAC LEMANS

    • CC: 5733
    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: A
    • CUI: 350
    • EngineType: V8

    1973 OLDSMOBILE CUTLASS

    • CC: 5733
    • Liter: 5.7
    • SubModel: S
    • EngineType: V8

    1977 CHEVROLET MALIBU

    • EngineType: ALL
    • SubModel: SPORT

    1978-1981 CHEVROLET MONTE CARLO

    • EngineType: ALL
    • SubModel: LANDAU

    1975 CHEVROLET MALIBU

    • Liter: 7.4
    • SubModel: CLASSIC
    • CUI: 454
    • EngineType: V8

    1973 BUICK CENTURY

    • Liter: 7.5
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: T
    • CUI: 455
    • EngineType: V8

    1975-1977 OLDSMOBILE CUTLASS

    • Liter: 4.3
    • SubModel: S
    • CUI: 260
    • EngineType: V8

    1974 BUICK CENTURY

    • Liter: 7.5
    • SubModel: LUXUS
    • CUI: 455
    • EngineType: V8

    1973 OLDSMOBILE CUTLASS

    • CC: 5737
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8

    1973-1974 CHEVROLET MONTE CARLO

    • CC: 5737
    • Liter: 5.7
    • SubModel: BASE
    • EngineType: V8

    1973-1974 PONTIAC LEMANS

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8

    1982-1984 CHEVROLET MONTE CARLO

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8

    1981 PONTIAC GRAND PRIX

    • Liter: 4.4
    • EngineType: V8
    • SubModel: BASE

    1973 CHEVROLET MONTE CARLO

    • CC: 7439
    • Liter: 7.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: X
    • CUI: 454
    • EngineType: V8

    2002 CHEVROLET SILVERADO 1500

    • EngineType: ALL
    • SubModel: CUSTOM

    1974 OLDSMOBILE CUTLASS SUPREME

    • CC: 5733
    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: K
    • CUI: 350
    • EngineType: V8

    1974 CHEVROLET MALIBU

    • Liter: 7.4
    • EngineType: V8
    • SubModel: CLASSIC

    1985-1987 OLDSMOBILE CUTLASS

    • EngineType: ALL
    • SubModel: ALL

    1976 PONTIAC VENTURA

    • EngineType: L6
    • SubModel: BASE

    1979-1980 CHEVROLET MALIBU

    • Liter: 5.7
    • EngineType: V8
    • SubModel: CLASSIC

    1976 OLDSMOBILE CUTLASS

    • Liter: 7.5
    • SubModel: VISTA CRUISER
    • CUI: 455
    • EngineType: V8

    1974 BUICK CENTURY

    • CC: 7456
    • Liter: 7.5
    • Aspiration: N
    • SubModel: LUXUS
    • Engine Vin: U
    • CUI: 455
    • EngineType: V8

    1974 PONTIAC LEMANS

    • CC: 5733
    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: B
    • CUI: 350
    • EngineType: V8

    1978 BUICK SKYLARK

    • CC: 3800
    • Liter: 3.8
    • SubModel: SPORT
    • CUI: 231
    • EngineType: V6

    1973 OLDSMOBILE CUTLASS

    • CC: 5737
    • Liter: 5.7
    • Aspiration: N
    • SubModel: S
    • Engine Vin: K
    • CUI: 350
    • EngineType: V8

    1977 PONTIAC VENTURA

    • Liter: 5.0
    • SubModel: SJ
    • CUI: 305
    • EngineType: V8

    1976 CHEVROLET NOVA

    • CC: 5031
    • Liter: 5.0
    • SubModel: CONCOURS
    • EngineType: V8

    1973-1974 CHEVROLET MONTE CARLO

    • EngineType: ALL
    • SubModel: LANDAU

    1982 CHEVROLET MONTE CARLO

    • Liter: 4.4
    • EngineType: V8
    • SubModel: BASE

    1979-1980 CHEVROLET MALIBU

    • EngineType: ALL
    • SubModel: ESTATE

    1975 CHEVROLET NOVA

    • Liter: 4.1
    • SubModel: CUSTOM
    • CUI: 250
    • EngineType: L6

    1974 BUICK CENTURY

    • Liter: 7.5
    • SubModel: BASE
    • CUI: 455
    • EngineType: V8

    1981 PONTIAC LEMANS

    • Liter: 3.8
    • SubModel: BASE
    • CUI: 229
    • EngineType: V6

    1978 PONTIAC GRAND PRIX

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8

    1973 PONTIAC GRAND AM

    • CC: 5737
    • Liter: 5.7
    • SubModel: BASE
    • EngineType: V8

    1978-1979 OLDSMOBILE CUTLASS

    • EngineType: ALL
    • SubModel: ALL

    1977-1978 PONTIAC LEMANS

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8

    1976-1977 OLDSMOBILE OMEGA

    • EngineType: ALL
    • SubModel: SX

    1973-1974 OLDSMOBILE CUTLASS

    • CC: 4097
    • Liter: 4.1
    • SubModel: BASE
    • CUI: 250
    • EngineType: L6

    1973 PONTIAC GRAND AM

    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8

    1979 CHEVROLET MALIBU

    • Liter: 5.0
    • EngineType: V8
    • SubModel: CLASSIC

    1973-1974 CHEVROLET MALIBU

    • CC: 5737
    • Liter: 5.7
    • SubModel: BASE
    • EngineType: V8

    1976-1977 OLDSMOBILE OMEGA

    • Liter: 4.3
    • SubModel: F85
    • CUI: 260
    • EngineType: V8

    1977 CHEVROLET NOVA

    • Liter: 4.1
    • SubModel: CONCOURS
    • CUI: 250
    • EngineType: L6

    1977 OLDSMOBILE CUTLASS

    • Liter: 6.6
    • SubModel: S
    • CUI: 403
    • EngineType: V8

    1975-1976 BUICK SKYLARK

    • Liter: 4.3
    • SubModel: BASE
    • CUI: 260
    • EngineType: V8

    1977 PONTIAC GRAND PRIX

    • Liter: 5.7
    • SubModel: LJ
    • CUI: 350
    • EngineType: V8
    Items You Need