Skip to Product Info
    • Photo - Primary
    • Photo - Primary
    • Photo - Close Up
    • Photo - out of package
    • Logo Image
    Sale!New!

    QA1 GM Pro Front Coil-Over System - Double Adj. - 10in x 400lbs/in - Flat Large - Aluminum

    Vendor: QA1
    SKU: QAPGD401-10400C
    Save $104.06
    Sale Price $964.95 Regular Price $1,069.01
    Fast Fulfillment: In-stock parts typically ship same day or next business day.
    Free Shipping on Orders Over $99 | Excludes freight shipments
    Professional, Enthusiast-Driven Customer Support
    International Shipping Available - Contact Us!
    Payment & Security

    Payments are processed through secure, encrypted payment systems. Your credit card information is transmitted directly to the payment processor and is never stored or accessible by us.

    • Amazon
    • American Express
    • Apple Pay
    • Diners Club
    • Discover
    • Google Pay
    • Mastercard
    • PayPal
    • Shop Pay
    • Venmo
    • Visa

    These QA1 GM Pro Coil Systems are a great option for anyone looking for fully adjustable ride height and valving control. Choose a spring rate and adjustability that fits your driving style, adjust the valving to match and you are on your way. These shocks also utilize a fully threaded body that allows you to adjust your ride height for the perfect stance or to finely tune the weight balance for superior handling. Specially designed for QA1's Pro Coil Systems, the American-made lightweight high travel springs have fewer coils and a smaller wire diameter, resulting in increased travel due to the larger distance between the coils. They reduce unsprung weight and react faster, optimizing suspension performance. Multiple spring rate options are also available and have been successfully tested in various applications, from casual street driving to hard core race applications. Adjustable Pro Coil System Features: Available in independent compression and rebound double adjustable, simultaneous compression and rebound adjustable, or drag "R" Series adjustable, Lightweight Billet Aluminum Coil-Over Shocks, High Travel Springs, Easy, Bolt-In Installation, Ride Height Adjustable, 100% Dyno Tested and Serialized, Serviceable and Rebuildable by QA1 Authorized Service Centers, Made in the USA, Used in drag racing, street performance, autocross, road racing and street rod applications, Sold in Pairs, Non-Adjustable Pro Coil System Features: Steel, Stock Appearing Coil-Over Shocks, High Travel Springs, Easy, Bolt-In Installation, Ride Height Adjustable, Used in drag racing, street performance, autocross, road racing and street rod applications, Sold in Pairs

    Installation Instructions
    • Achieve the ultimate balance of ride quality and performance handling with independent tuning of rebound and compression valving.
    • Easy bolt-in installation that works with your factory or upgraded QA1 tubular control arms.
    • Up to 2 of ride height adjustment allows you to dial in the perfect stance.
    • Limited Lifetime Warranty for peace of mind.
    • Proudly made in the USA

    This Part Fits:

    Year Make Model Submodel
    1975 Buick Apollo Base
    1975 Buick Apollo SR
    1973-1977 Buick Century Base
    1975-1977 Buick Century Custom
    1976 Buick Century Indianapolis 500 Pace Car
    1973-1975 Buick Century Luxus
    1975-1977 Buick Century Special
    1973-1987 Buick Regal Base
    1988 Buick Regal Custom
    1982-1983 Buick Regal Estate Wagon
    1987 Buick Regal GNX
    1984-1987 Buick Regal Grand National
    1978-1988 Buick Regal Limited
    1982 Buick Regal Limited Turbo
    1978-1982 Buick Regal Sport
    1976-1977 Buick Regal SR
    1983-1986 Buick Regal T-Type
    1975-1979 Buick Skylark Base
    1978-1979 Buick Skylark Custom
    1976-1979 Buick Skylark S
    1978 Buick Skylark Sport
    1975-1977 Buick Skylark SR
    1973 Chevrolet Chevelle Deluxe
    1973-1987 Chevrolet El Camino Base
    1975-1977 Chevrolet El Camino Classic
    1977-1978,1981-1986 Chevrolet El Camino Conquista
    1973-1974 Chevrolet El Camino Custom
    1979-1981 Chevrolet El Camino Royal Knight
    1973-1987 Chevrolet El Camino SS
    1978-1981 Chevrolet Malibu Base
    1978-1982 Chevrolet Malibu Classic
    1978-1980 Chevrolet Malibu Classic Estate
    1978-1981 Chevrolet Malibu Classic Landau
    1979-1980 Chevrolet Malibu Classic Sport
    1979-1980 Chevrolet Malibu Estate
    1979 Chevrolet Malibu Landau
    1979 Chevrolet Malibu Police
    1979-1980 Chevrolet Malibu Sport
    1973-1974,1979,1981-1988 Chevrolet Monte Carlo Base
    1983 Chevrolet Monte Carlo CL
    1973-1974,1976,1978-1981 Chevrolet Monte Carlo Landau
    1986-1988 Chevrolet Monte Carlo LS
    1973,1975-1977 Chevrolet Monte Carlo S
    1978,1980 Chevrolet Monte Carlo Sport
    1983-1988 Chevrolet Monte Carlo SS
    1975-1979 Chevrolet Nova Base
    1976-1977 Chevrolet Nova Concours
    1975,1978-1979 Chevrolet Nova Custom
    1975 Chevrolet Nova LN
    1975-1978 Chevrolet Nova Police
    1977-1979 Chevrolet Nova Rally
    1976 Chevrolet Nova SS
    1991 Chevrolet S10 Baja
    1982-2003 Chevrolet S10 Base
    1982-1990 Chevrolet S10 Durango
    1992-1993 Chevrolet S10 EL
    1994-2004 Chevrolet S10 LS
    1982-1989 Chevrolet S10 Sport
    1994-1998 Chevrolet S10 SS
    1982-1992 Chevrolet S10 Tahoe
    1999-2003 Chevrolet S10 Xtreme
    1994-2003 Chevrolet S10 ZR2
    2002-2004 Chevrolet S10 ZR5
    1981-1986 GMC Caballero Amarillo
    1981-1987 GMC Caballero Base
    1981 GMC Caballero Conquista
    1981-1987 GMC Caballero Diablo
    1981 GMC Caballero Royal Knight
    1982-1990 GMC S15 Base
    1987 GMC S15 EL
    1983,1986-1988 GMC S15 Gypsy
    1982-1990 GMC S15 High Sierra
    1982-1990 GMC S15 Sierra Classic
    1982 GMC S15 Sierra Grande
    1991-1993 GMC Sonoma Base
    1992 GMC Sonoma GT
    1994-2004 GMC Sonoma SL
    1991-2001 GMC Sonoma SLE
    1993-2004 GMC Sonoma SLS
    1973-1977 GMC Sprint Base
    1975-1977 GMC Sprint Classic
    1973-1974 GMC Sprint Custom
    1975 GMC Sprint High Sierra
    1976 GMC Sprint Sierra Madre Del Sur
    1975-1976 GMC Sprint SP
    1975,1977 Oldsmobile Cutlass 442
    1973-1975,1980 Oldsmobile Cutlass Base
    1980-1981 Oldsmobile Cutlass Brougham
    1977 Oldsmobile Cutlass Colonnade
    1976-1977 Oldsmobile Cutlass Colonnade S
    1980-1981 Oldsmobile Cutlass LS
    1973-1977 Oldsmobile Cutlass S
    1976-1979 Oldsmobile Cutlass Vista Cruiser
    1979 Oldsmobile Cutlass Vista Cruiser Brougham
    1973-1977 Oldsmobile Cutlass Supreme Base
    1977 Oldsmobile Cutlass Supreme Brougham
    1976-1977 Oldsmobile Cutlass Supreme Colonnade
    1974-1975 Oldsmobile Cutlass Supreme Cruiser
    1975 Oldsmobile Cutlass Supreme Hurst
    1975-1979 Oldsmobile Omega Base
    1976-1979 Oldsmobile Omega Brougham
    1978-1979 Oldsmobile Omega Brougham LS
    1977 Oldsmobile Omega Deluxe
    1976-1977 Oldsmobile Omega F85
    1975 Oldsmobile Omega Salon
    1976-1978 Oldsmobile Omega SX
    1978-1987 Pontiac Bonneville Base
    1978-1986 Pontiac Bonneville Brougham
    1984-1987 Pontiac Bonneville LE
    1978-1981 Pontiac Bonneville Safari
    1973-1975,1978-1980 Pontiac Grand Am Base
    1973-1974,1976-1987 Pontiac Grand Prix Base
    1981-1987 Pontiac Grand Prix Brougham
    1984-1987 Pontiac Grand Prix LE
    1975,1977-1983 Pontiac Grand Prix LJ
    1975-1980 Pontiac Grand Prix SJ
    1973-1981 Pontiac LeMans Base
    1973-1974 Pontiac LeMans Luxury
    1973-1975,1977-1981 Pontiac LeMans Safari
    1974 Pontiac LeMans Safari Luxury
    1973-1977 Pontiac LeMans Sport
    1977-1979 Pontiac Phoenix Base
    1978-1979 Pontiac Phoenix LJ
    1978-1979 Pontiac Phoenix SJ
    1975-1977 Pontiac Ventura Base
    1975 Pontiac Ventura Custom
    1975 Pontiac Ventura S
    1975-1977 Pontiac Ventura SJ
    Shipping Policy

    Shipping Policy Last Updated: April 2026

    We're committed to getting your order to you as quickly and transparently as possible. Here's everything you need to know about how we ship.

    Order Cancellations

    Once an order is placed, cancellations are not guaranteed as orders are sent to fulfillment quickly. If you need to cancel, contact us immediately at sales@berryperformancesales.com. If a cancellation is possible, the buyer is responsible for any transaction fees incurred. If the order has already shipped, it cannot be cancelled and must go through our standard return process.

    Processing Time

    In-stock orders are typically processed and shipped within 1–2 business days of receiving payment, unless otherwise noted on the product page. Orders placed on weekends or holidays will be processed on the next business day.

    Shipping Costs

    Shipping costs are calculated at checkout based on the shipping method selected, package weight and dimensions, and destination address. You can review all shipping costs before finalizing your purchase.

    Estimated Delivery Times

    Domestic orders typically arrive within 1–7 business days after shipment, depending on your location and the carrier. Please note that delivery times are estimates and are not guaranteed. Delays due to weather, carrier volume, or other circumstances beyond our control may occur.

    Tracking Information

    Once your order ships, you will receive a confirmation email with tracking information. Use this to monitor your package's progress. If your tracking has not updated within 48 hours of receiving your confirmation email, please contact us and we'll look into it.

    Shipping Address

    Please ensure your shipping address is accurate and complete before placing your order. If you realize an error after ordering, contact us immediately at sales@berryperformancesales.com — we will do our best to make the correction, but changes cannot be guaranteed once an order is in fulfillment. We are not responsible for orders shipped to incorrect or undeliverable addresses due to customer error.

    Please note: We are unable to ship to P.O. Boxes. Please provide a physical delivery address at checkout.

    Lost or Stolen Packages

    If your tracking shows your order as delivered but you have not received it, please take the following steps:

    • Check around your property and with neighbors
    • Confirm the shipping address on your order was correct
    • Contact the carrier directly with your tracking number

    If the issue remains unresolved, contact us at sales@berryperformancesales.com within 5 business days of the marked delivery date. We will work with you and the carrier to investigate. Berry Performance Sales is not responsible for packages confirmed as delivered by the carrier or for packages stolen after delivery.

    Damaged in Transit

    If your order arrives visibly damaged, please refer to our Returns & Refunds policy for instructions on how to report the issue. Carrier damage claims must be reported within 48 hours of delivery.

    International Shipping

    We do ship internationally! Because shipping costs, carrier options, and transit times vary significantly by destination, international orders require a custom quote prior to purchase. To request a shipping quote, contact us at sales@berryperformancesales.com with the following:

    • Your country and full delivery address
    • The item(s) you are interested in ordering

    We will respond with a shipping quote as quickly as possible. Please note that customs duties, import taxes, and any other fees charged upon delivery are the sole responsibility of the recipient and are not included in your shipping quote. We recommend checking with your local customs office before placing your order.

    Off-Road Use Disclaimer

    All products are sold for off-road use only unless otherwise specified. The buyer assumes full responsibility for installation and operation. Berry Performance Sales is not liable for any incidental, indirect, or consequential damages including engine failure, labor charges, or vehicle downtime resulting from the use of any product sold. By placing an order, you acknowledge and accept these terms.

    Questions?

    We're happy to help before, during, or after your purchase. Email: sales@berryperformancesales.com

    Berry Performance Sales reserves the right to update this policy at any time. Changes take effect immediately upon posting. It is the customer's responsibility to review the current policy at the time of purchase.

    Return Policy

    Returns & Refunds Last Updated: April 2026

    We want you to love what you ordered. If something isn't right, here's everything you need to know.

    30-Day Return Window

    You have 30 days from the date of purchase to initiate a return. After this window, we are unable to accept returns. We do not offer exchanges — all approved returns are refunded per the terms below.

    How to Initiate a Return

    To request a return, contact us at sales@berryperformancesales.com with your order number and reason for return. All returns must be approved by our team before any item is shipped back to us. Once your return has been approved, your item must be shipped within 10 days of approval. Items shipped without prior approval or outside this window will be refused and returned to sender.

    Return Conditions

    To be eligible for a return, items must be:

    • Unused and in original condition
    • In original packaging
    • Inclusive of all parts and accessories

    Custom ordered products are non-returnable. If you're unsure whether your item qualifies, contact us before purchasing.

    Once we receive your return, we will inspect the item before processing any refund. We reserve the right to deny or adjust your refund if the item is received in a condition that differs from what was originally shipped — including signs of use, missing parts, or damage that occurred after delivery.

    Fees to Know Upfront

    We believe in being transparent about costs:

    • Restocking Fee: 20% — deducted from all return refunds
    • Return Shipping: Buyer's responsibility on all standard returns
    • Cancellation (Installment/Payment Plan): 7% fee to cover transaction costs
    • Cancellation (Credit Card/PayPal): 3.5% processing fee

    Damaged or Defective Items

    If your order arrives damaged or defective, you must contact us within 48 hours of delivery at sales@berryperformancesales.com. Claims reported outside this window may not be eligible for resolution.

    When contacting us, please include:

    • Your order number
    • A description of the issue
    • Clear photos or video of the damage or defect

    If your item was damaged during shipping, this is handled as a carrier claim separate from our standard return process — we will assist you in filing that claim. Items confirmed to be defective due to a manufacturing or fulfillment error will have return shipping costs covered by Berry Performance Sales.

    Refunds

    Once we receive and inspect your return, refunds are processed within 3–5 business days back to your original payment method. You'll receive a confirmation once it's been issued.

    Questions?

    We're happy to help before, during, or after your purchase. Email: sales@berryperformancesales.com

    Berry Performance Sales reserves the right to update this policy at any time. Changes take effect immediately upon posting. It is the customer's responsibility to review the current policy at the time of purchase.

    Disclaimer

    All products are sold for off-road use only unless otherwise specified. Buyer assumes all responsibility for installation and operation. Seller is not liable for any incidental, indirect, or consequential damages — including engine failure, labor costs, or vehicle downtime — resulting from the use of any product sold.

    By making a purchase from Berry Performance Sales, you acknowledge and agree to abide by the terms and conditions of these Policies.

    For any questions or concerns, please contact us — we’re always happy to help.

    Recently Viewed