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Suspension and Components› Shocks, Struts, Coil-Overs and Components
QA1 Precision Products, Inc
QA1 GM Pro Front Coil-Over System - Single Adj. - 10in x 450lbs/in - Flat Large - Aluminum
SKU: Q00B GS401-10450C
Moderate — 2–4 hours
Overview
Featuring a 450 lb/in spring rate and a 10-inch spring, these coil-overs are built for high travel and optimal performance. They are designed for an easy bolt-in installation that works with both original equipment and QA1 tubular control arms. The kit includes a limited lifetime warranty for peace of mind.
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Part #: GS401-10450C
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
Features:
- QA1 uniquely engineered to enhance the performance of your vehicle
- Ride height adjustability
- Adjustable shock valving options for all driving styles
- Easy bolt-in install
- Best-in-class warranty
- Made in the USA
Front Pro Coil single adjustable stock mount shock kit. Compressed length of 8.63" and extended length of 12.88". Includes 10" spring with rating of 450 and has a large tapered flat end.
This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
Vehicle Symptoms
- Bouncy or harsh ride over bumps
- Rear end sagging or uneven stance
- Excessive body roll in corners
- Bottoming out on dips or driveways
- Poor handling or wandering steering
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Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
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Specifications
| Brand | QA1 Precision Products, Inc |
| Part Number | Q00B GS401-10450C |
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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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