New Product: QA1 Launches Fully Adjustable Pro Coil Coil-Over System for 07-18 Silverado and Sierra Trucks.

If you haven’t been paying attention, then you might have missed all the killer suspension systems that have been coming out of QA1 for the past few years. With new systems for muscle cars, classics, and trucks, there isn’t much they don’t cover. And with multiple options for lots of platforms, they’ve got something for everyone. Whether you are drag racer, autocross enthusiast, or just someone that enjoys driving your classic on road trips, they have what you need. But QA1 realizes that enthusiasts who want their classic to ride and handle great also want the same from their daily driver late model trucks. This is a system just for them. Not only will this system improve the ride and handling dramatically, but it will improve the looks by lowering your truck as God intended. Just saying.

Check out all the info on this newest Silverado kit below and get your QA1 on with your own ride.



May 31, 2023 – Lakeville, MN – QA1, a leading manufacturer of high-performance suspension and shock components, announces the launch of its Pro Coil coil-over system for 07-18 Silverado and Sierra trucks. This fully adjustable and bolt-in solution allows truck owners to customize their ride height and achieve the perfect stance.

“Our Pro Coil coil-over system is a game-changer for truck enthusiasts who want to take their ride to the next level,” said Jesse Cowles, Product Manager at QA1. “With the ability to adjust the ride height, our customers can easily achieve the perfect look they desire, while also improving their truck’s handling and ride quality.”

The Pro Coil coil-over system is a fully bolt-in solution that replaces the OE suspension and allows for a 4-6″ drop with the use of drop spindles. The system is available in two options: single-adjustable and double-adjustable coil-overs. The single-adjustable coil-overs allow for easy fine-tuning of the ride, while the double-adjustable coil-overs provide independent tunability for both rebound and compression, making them the perfect choice for performance enthusiasts.

In addition to ride height adjustability, the Pro Coil coil-over system features heavy-duty construction to withstand the weight and payload capacity of modern trucks. The system includes an upgraded shock and a 1″ chromoly T-bar.

Installing the Pro Coil coil-over system is a breeze, with new hardware and detailed installation instructions included. Plus, with registration, the shocks are backed by a best-in-class Limited Lifetime Warranty.

Don’t settle for a lackluster stance or subpar ride quality in your truck. Upgrade to QA1’s Pro Coil coil-over system and experience the ultimate in customization and performance.

Product Overview 

The QA1 lowering kit is an all-in-one solution for anyone looking to upgrade the suspension of their 07-18 Silverado 1500 / Sierra 1500’s. This kit includes both QA1’s front Pro Coil Coil-Overs and Rear Drop Kit, which provide maximum adjustability to achieve the perfect lowered stance, while providing significant improvements to ride quality and performance. 

Ride Height Adjustability

QA1 lowering kits offer easy and precise adjustments for your truck’s stance. Fully threaded front coil-over shock bodies provide adjustment without the use of clumsy shims or spacers, while our rear drop kits offer 2” of adjustment to dial in the final rake of the truck. 

Front coil-overs provide a drop range of 3″-5″ using drop spindles or 1″-3″ with stock spindles. Lower the rear with a drop range of 2-3”. (Pick One)

Front coil-overs provide a drop range of 3″-5″ using drop spindles or 1″-3″ with stock spindles. Lower the rear with a drop range of 4-6”. (Pick One)

Heavy Duty Shock Design 

QA1 Engineers have tackled the challenge of supporting the weight and payload capacity of modern trucks by designing the heavy-duty version of our Pro Coil system, which features an upgraded shock with polyurethane bushings and a 1″ chromoly T-bar. The system’s new bushing design was specifically chosen to withstand the daily use of trucks, rather than using spherical bearings. 

Single-Adjustable Shocks (Pick One)

QA1 Proma Star single adjustable shocks deliver exceptional ride quality and performance to your Silverado. With the simple turn of a dial, you can effortlessly switch between a comfortable cruise and a more aggressive feel, making them ideal for daily driving or twisty backroads.

Double-Adjustable Shocks (Pick One)

Upgrade your Silverado’s performance to the next level with QA1 double adjustable Pro Coil shocks. Perfect for both street and track use, double adjustable shocks are famous for their independent rebound and compression tunability, giving you exceptional handling and control for finer control over your suspension.

Rear Shackles and Hanger Kits

QA1’s Rear Shackle and Hanger Kits are the ultimate solution for lowering the rear of your truck without compromising ride quality. Made from heavy-gauge steel with a powder-coated finish and top-notch hardware, our kits guarantee long-lasting performance in any driving conditions.

Easy, Bolt-In Installation

Our commitment to thoughtful product design is evident in every fully bolt-in kit we produce, which guarantees a hassle-free installation process.

Best In-Class Lifetime Warranty

Register at for lifetime coverage of your QA1 shocks.

Made in the USA

QA1 truck suspension is proudly made in Lakeville, Minnesota. 

Fitment Notes

Axle U-bolts not included 

Does not fit 1500HD model trucks 

Offset upper control arm bushings (AcDelco PN 45K0201) may be required on vehicles lowered more the 2.5” to align within the factory specifications.




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