QA1's No BS Approach to New Body Style Truck Suspensions

In the world of modern hot rodding, few vehicles are hotter than Chevrolet’s New Body Style (NBS) trucks. They were produced from 1999 though 2006 and replaced the insanely popular previous generation haulers, known affectionately today as OBS (for the 1988-1998 “Old Body Style”). Few companies do truck suspensions like QA1, whether it is simple ride and handling improvements with a set of shocks, or a full-on upgrade with a complete complement of parts.

With QA1’s New Body Style truck suspension parts, your Chevy Silverado or GMC Sierra can be low and lean.

Now QA1 has introduced a full line of New Body Style truck suspension parts to improve the ride and handling, taking it light years ahead of stock. If you want to hot rod your 1999-2006 Chevy Silverado or GMC Sierra, the Minnesota-based company has what you need, from simple parts to the sublime. Let’s face it, QA1’s reputation for stellar products, from shocks and suspension parts to carbon fiber driveshafts, is impeccable. Why would its truck parts be any different?

True to their heritage, NBS trucks use an upper and lower A-arm front suspension with coil springs or torsion bars and monoturbe or twin-tube shocks, with multi-leaf springs and a solid axle out back. They were rugged, durable, and perfect for their primary usage as work vehicles that offered decent comfort as daily drivers.

NBS trucks have followed their OBS predecessors as genuine, all around play toys that can haul — whether that’s on the street, strip, lumber yard or autocross course.

QA1, long a leader in suspension technology, can help you precisely craft your NBS truck exactly the way you want it.

Combined with drop spindles, you can drop your NBS 3- to 5-inches in front. The rear kit includes adjustable shackles and hangers to dial in a 2- to 6-inch drop.

QA1 NBS Level 1 Lowering Kit

The Level 1 Lowering Suspension Kit for 1999–2006 Silverado and Sierra New Body Style trucks offers what QA1 calls, “an ideal blend of ride quality, stance, and adjustability for everyday use.” Designed for the driver who wants an aggressive drop with modern comfort and handling, this kit delivers without requiring major chassis modifications.

At the front, QA1’s threaded-body coilover shocks offer height adjustability without spacers or shims. Combined with optional drop spindles, you can achieve a total front drop range of 3- to 5-inches, while the rear kit includes adjustable shackles and hangers to dial in a 2- to 6-inch drop (depending on your configuration). Whether you’re going for a 2/3, 3/5, or 4/6 drop, this system has plenty of range and flexibility.

QA1’s front coil-over conversion uses specifically designed springs for a direct bolt-in system — no cutting required. The single adjustable Proma Star shocks allow quick rebound tuning with a simple twist of the dial — making it easy to soften the ride for a daily commute or firm it up for a backroad cruise.

The Level 1 Suspension Kit is designed for NBS truck owners who want to improve their vehicle’s handling and stance without major modifications. It’s ideal for daily-driven trucks and weekend cruisers that prioritize comfort and visual appeal, while still enjoying modern responsiveness and adjustability.

QA1 Level 2 Suspension Kit

The Level 2 Suspension Kit is for those who are really serious about setting their New Body Style truck apart from others in the handling department. This system takes things up a notch with QA1’s double adjustable coilover shocks, which allow you to independently dial-in both compression and rebound with 18 clicks of adjustment. This level of control is ideal for fine-tuning balance, handling response, and ride quality whether on backroads or pushing hard through corners.

QA1’s lightweight tubular control arms feature built-in negative camber with low friction polymer bushings and QA1 low friction ball joints to maintain precise alignment and allow for free moving suspension. In the rear, a bolt-in torque arm and panhard bar setup includes new crossmembers to work with the factory fuel tank and allow over the axle exhaust routing while lowering the rear of the truck 4-to-7-inches.

Going with Level 2 also means saying goodbye to the factory leaf springs for a multi-link torque arm design to maximize traction and ride quality. The torque arm is designed to eliminate suspension bind, transfer weight more effectively, and give you more control over your truck’s pinion angle. This will help your Silverado or Sierra launch harder and corner more effectively.

The Level 2 kit includes 1.5-inch front and 1.25-inch rear sway bars with spherical rod end links to reduce bind and increase chassis response. The sway bars are lighter and stiffer than stock, which improves turn-in and mod-corner control.

The Level 2 kit eliminates the factory's antiquated leaf springs and replaces them with adjustable coilovers and a torque arm, among other goodies.

Stage Upgrades Available

The beauty of QA1’s NBS systems is that you can upgrade your truck in different stages, as finance or desire (or both) dictate. Some may just want the benefits of the front coilover and control arm kit. The rear drop kit is also available as a stand-alone set-up.

QA1’s front coilover and control arm kit delivers 1- to 3-inches of ride height adjustability (or 3- to 5 inches with drop spindles), improved suspension geometry, and tunable ride quality — all in a bolt-on, made-in-the-USA package.

The bolt-in rear torque arm suspension system for 2WD trucks replaces stock leaf springs with a true multi-link setup, delivering better traction, improved ride quality, and full adjustability with double adjustable coil-overs — all without the need for welding or fabrication.

The rear drop kit for 1999–2006 Silverado and Sierra 1500s. It is a bolt-in solution that lets you fine-tune your rear ride height by 2- to 4-inches while maintaining smooth, controlled ride quality. This is an ideal match if you lower the front.

QA1’s tubular lower control arms for 2WD 1500 New Body Style trucks are bolt-in upgrades designed specifically for coil-over setups, delivering improved geometry, added clearance, and enhanced handling for lowered or performance-oriented trucks.

Upper Control Arms Kit: QA1’s tubular upper control arms improve front suspension geometry, alignment, and strength — ideal for lowered or performance 2WD builds.

2-Inch Drop Spindles: QA1’s 2-inch drop spindles for 2WD Silverado 1500s provide a clean, bolt-on front drop without compromising ride quality, geometry, or suspension travel — great for use with QA1 or factory control arms.

Front Sway Bar: Reduces chassis roll and front-end dive during cornering, delivering flatter, more predictable handling in turns. The 1.5-inch diameter bar increases torsional rigidity for improved steering response and better front-end stability, especially under load or during aggressive driving. Compatible with 2WD model 1500s.

Rear Sway Bar: Designed for 2WD models, the 1.25-inch diameter bar reduces rear body roll and improves overall stability by increasing stiffness through corners, helping the truck stay flatter and more controlled under load. This bar pairs well with a front sway bar or torque arm system for balanced, predictable handling in lowered or performance builds.