BDS723FDSC BDS Suspension 2.5" Coilover Conversion Kit w/ Overload Springs - GMC/Chevy 6.6L Duramax 2011-2019

Overview

BDS is now providing 2-3" coilover conversion systems for superior ride quality and performance over any terrain. These new coilover systems have been engineered and tested for improved comfort, fade free performance, and increased suspension travel. At the heart of the system is a pair of FOX 2.5 Factory Series Coilover with remote DSC reservoir. These coilovers offer vastly superior dampening for impressive capability to soak up the harshest terrains offroad while offering comfort on your daily commute. These FOX coilovers feature a smooth bore and honed seamless alloy body, 7/8" hardened stainless steel shaft, FOX coil springs, black anodized machined 6061-T6 billet aluminum mounts and FOX's DSC (dual speed compression) adjustment technology. The coilovers come fully assembled, preset for 2.5'' of lift for optimal wheel travel, but can be adjusted between 2-3" of lift with the use of (#129600) spanner wrench. To mount the coilovers BDS supplies a bolt-on bracket that installs on the frame in the shock mount location. A weld-in support gusset is used to reinforce the upper mount, however still allows the kit to be completely reversible if the owner ever chooses to revert back to the torsion bar style suspension and upgrade the suspension on another truck.

In addition to replacing the factory torsion bars, the upper and lower control arms are upgraded to improved strength, travel, and accommodate the new coilovers. The arms are fabricated from large 1.5" OD x .120-wall chromoly tubing, fully TIG welded for the highest quality, strength and durability. The arms utilize premium Moog brand ball joints and factory style rubber bushings for smooth, quiet operation and superior durability when compared to arms with uni-balls, poly bushings or heims. The ball joint cups are repositioned for optimal performance allowing a 30% improvement in wheel travel. The FOX upper control arms are finished in a durable black powdercoat and include a FOX branded billet aluminum ball joint dust cap. The control arms come fully assembled for easy install right out of the box. To compliment the uppers, the new lower control arms are built from high strength steel, fully boxed with internally gusseted. These lower arms integrate new reinforced lower coilover mounts and similar to the uppers use durometer specific rubber bushings at the frame mount and high quality Moog ball joints at the knuckle mount for quiet, low maintenance operation.

Rounding out the front suspension BDS supplies front differential relocation to correct CV axle operating angle to optimize CV performance. The relocation hardware installs easily with no differential modification needed while also allowing the reinstallation of the factory skid plate. Longer sway bar links are also included and bolt directly in place of the factory links to correct sway bar operating angle. In the rear, BDS offers a simple block and u-bolt kit that retains ride quality and full use of the factory overload spring (if equipped). The rear comes standard with precision tuned FOX 2.0 IFP gas shocks.

Kit Components

BDS011217: 11-20 Chevy HD 2in Rear Block w/ overload X1

BDS021251: 11-16 Chevy 2500HD LCA Kit - DRV X1

BDS021252: 11-16 Chevy 2500HD LCA Kit - PASS X1

BDS021253: 11-16 Chevy 2500HD C/O Conv Frt Box Kit X1

BDS121250: 11-up Chevy 2500HD UCA Kit X1

FOX88406128: BDS 11-19 GM 2500/3500 HD Front Coils X1

FOX98224758: Fox 2.0 Shock 27.95 x 17.35 x 2- EB1/EB1 X2

Important Kit Notes

• Minor metal trimming may be required with 35x12.50R20 on 20x9 w/5-5.5" BS
• Requires minor welding
• Coilovers are preset for DIESEL engine models. The use of the coilovers on GAS engine models is not recommended due to providing too much lift. Available preload adjustment is typically not enough to achieve desired ride height.
• Factory 17" and 18" wheels cannot be reinstalled. Factory 20" wheels can be reused with stock tire size. See instructions for detailed wheel/tire fitment notes.
• Dually Models will require aftermarket 20" wheels with a max tire size of 285/60/20.

How to Tell if your truck has Factory Overload Leaf Springs ?

We get asked quite often the question "How do I know if my truck has a factory overload leaf?"

It's actually quite easy to tell, look at your factory leafs behind one of your rear tires. The overload leafs are easy to see. Usually one ton trucks have overload leafs and 3/4 ton trucks do not have overload leafs but that's not always the case so the best thing to do is to have a look. The overload leaf packs do vary slightly from one truck to the next but generally they are one or two addition leafs mounted with a spacer on top of the main leaf pack. They will also have a stopper on the frame so that when your truck is overloaded the overload leaf pack will hit the frame stopper to provide addition support. They are manufactured this way to improve unloaded ride quality.

↑ The truck on the right has an overload leaf. It is spaced and bolted on top of the leaf spring pack

↑ This truck does not have an overload leaf. There is only the spring clamp on top of the leaf pack.

CLICK HERE to determine if your truck has Overload Springs