QA1 LK01-GMT03 4-6 Inch Lowering Kit, Single Adjujstable, 2WD

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. 

• Adjustable Ride Comfort and Handling Ability
• Adjustable Front and Rear Ride Height
• Heavy DUty Shock Design
• Made in the USA

Ride Height Adjustability

Whether you're looking for a 4/6 drop or aiming to go even lower, QA1's lowering kit is the ideal solution to achieve the perfect stance. The front coil-overs offer a drop range of 3"-5" when used with drop spindles (sold separately), or 1"-3" with stock spindles. For the rear, you can lower it within a range of 4-6" with ½-inch increment adjustments.

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

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.

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.

Made in the USA

QA1 truck suspension is proudly made in Lakeville, Minnesota. 

Fitment Notes

Requires use of QA1 spanner wrench T114W or T115W
Compatible with OEM or aftermarket drop spindles
Axle U-bolts not included 
Does not fit 1500HD model trucks or 2007 Silverado/Sierra 1500 Classic
Offset upper control arm bushings (AcDelco PN 45K0201) may be required on vehicles lowered more the 2.5” to align within the factory specifications.