BDS 4" Coilover System 19-21 GM 1/2 Ton Pickup 4WD Trail Boss/AT4

BDS Suspension raises the bar with 4" high clearance coilover systems for the 2019-2020 Chevy Trail Boss and GMC AT4 trucks offering next level performance and capability.

At the heart of these new systems are a pair of precision tuned FOX 2.5 factory race series remote reservoir coilovers engineered to outperform on and offroad as they soak up the terrain. These coilovers are preset for the correct lift height right out of the box to provide optimal performance and direct bolt-in replacement for the factory strut assemblies. They feature a smooth bore and honed seamless alloy body, 7/8" hardened steel carbon shaft, Eibach coil springs and black anodized machined 6061-T6 billet aluminum mounts along with remove reservoirs with mounting brackets. The reservoir is available with optional DSC (dual speed compression) adjustment technology built into the remote reservoir. DSC allows for easy adjustment of the vehicle's suspension compression dampening so you can dial in the ideal ride performance to soak up the bumps, both large and small. The DSC has 12 adjustment points for the high speed compression as well as 10 adjustment points for the low speed compression allowing you to make large or small changes to further improve your performance. Adjustments can be made by simply twisting the knobs located on the end of the reservoir. No tools or shop adjustments needed, allowing you to tune the suspension out on the trail. Complimenting the coilovers, BDS utilizes a pair of specially designed 1/4" thick laser cut high clearance crossmembers to maximize clearance and provide a solid mounting point for the OE lower control arms. These paired with the 3-piece heavy duty front skid plate system create a rigid subframe while adding protection for vital steering and driveline components. In place of the factory steering knuckles a pair of specially designed ductile iron replacement steering knuckles are supplied to maintain proper steering geometry for ESC system compatibility. These connect to the factory steering with a pair of heavy duty replacement tie rod ends included in the kit. The front differential is repositioned with BDS's multipoint relocation bracket system tying into the frame and control arm pockets to further secure the front differential to keep CV axle angles at a minimum. A billet aluminum front driveshaft spacer is also supplied along with longer hardware to allow the reinstallation of the factory driveshaft. A pair of BDS-branded sway bar drop brackets used to correct the operating angle of the factory sway bar as well as created a strong brace between the rear crossmember and the frame. Rounding out the front of this kit are new lower control arm cam bolts to allow alignment and a weld-in frame reinforcement plate for extra strength.

In the rear of this 4" lift system, the factory block is replaced with a 5" lift block and longer u-bolts to lift and level the stance. Also included, BDS supplies brake line and ABS line brackets allow the use of factory brake lines. Specially tuned FOX 2.0 IFP performance series gas shocks are supplied to round out the rear of these kits. All kits come finished in a durable textured black powdercoat and sent with all hardware packs to complete the install along with step-by-step installation instructions.

All BDS kits include Factory Protection Plus for the ultimate extended warranty to include BDS's No Fine Print Warranty, FMVSS No.126 (ESC System) compliance certification and a 5year-100mile drivetrain warranty to match the dealer.

Important Kit Notes

• 1. Does NOT fit Diesel Models
• 2. Requires frame bracket modification
• 3. Will not fit models with Adaptive Ride Control (ARC)
• 4. Factory 17-18" wheels cannot be reinstalled due to tie rod end interference, stock 20" wheels can be reinstalled
• 5. 17" wheels with 4.5" backspacing should be test fit prior to mounting the tire to ensure proper clearance to the steering knuckle / tie rod
• 6. All aftermarket wheels should be test fit prior to mounting the tire to ensure proper clearance to the brake caliper. Some wheel profiles will not clear the brake caliper. These can be test fitted before the vehicle is lifted in a stock condition
• 7. Actual ride height on coilover kits is closer to 4.5" of lift on Trail Boss/AT4

*Trimming may be required*

• Tire & Wheel Combinations
• 37x12.50 w/20x9/22x9 and 5.5-6.25" back spacing
• 35x12.50 w/20x9/22x9 and 5.5-6.25" back spacing
• 35x12.50 w/17x9/18x9/20x9 and 4.5" back spacing
• Est. Installation: 8 hours
• Difficulty Level (easy 1 - 5 complicated): 4