• BDS 4.5" Coil-Over Lift Kit
BDS740FDSC

BDS 4.5" Coil-Over Lift Kit for Chevy/GMC 2001-2010 1 2500/3500 Pickup 4WD, 2001-2006 Avalanche 2500 4WD, Suburban/Yukon XL 3/4 Ton 4WD

  • $4,823.11

Take your HD to the next level with the 4.5" coilover conversion system.
This system builds on the BDS high clearance system design offering more ground clearance or correct suspension, steer, driveline geometry and pairs it with the race proven pedigree of FOX 2.5 factory series coilovers to soak up the harshest terrain while still offering comfort and control for your daily commute. The coilovers come pretuned and ready to install right out of the box featuring dual speed compression (DSC) adjusters on the reservoir for easy tuning of the high-speed and low-speed compression damping without the need for special tools. To mount the coilovers BDS supplies a bolt-on bracket that installs on the frame in the shock mount location along with a weld-in support gusset is used to reinforce the upper mount.
In addition to replacing the factory torsion bars, the upper control arms (UCA) are upgraded to improved strength, travel, and accommodate the new coilovers. The uppers are new performance series upper control arms designed specifically for this system to integrate with the 2.5 coilovers. The arms are fabricated from large 1.5" OD x .120-wall tubing, fully welded and gusseted for the highest quality, strength and durability. The factory cast steel lower control arms are retained with the addition of a robust lower coilover mounting bracket. Along with the coilover conversion, these 4.5" coilover systems include a pair of one-piece laser cut high clearance crossmembers, CNC machined ductile iron steering knuckles to correct steering angles, heavy duty front skid plate and differential skid plate to increase protection, multipoint differential relocation brackets to secure differential and correct CV axle angles, CV spacers, and longer sway bar links. In the rear a 3" rear block and u-bolt kit is used to level the stance while a set of FOX 2.0 performance series IFP shocks are supplied to pair with the front coilovers for impressive performance wherever your the adventures lead you.

Note: Components displayed in images may change based upon selections.

1. Torsion Bar tool required to load/unload the torsion bars
2. Some welding required
3. Requires frame bracket modification and differential mount modification
4. Traction bars will not fit standard cab/short box models and are designed to work on vehicles with 4" to 8" of lift
5. 20" wheels with 5" to 5.75" backspacing recommended to reduce trimming
6. Gas models require exhaust modification
7. Narrow track knuckle will slightly increase turning radius
8. For tail high stance use #119157 add-a-leaf with the block kit or #069207 with leaf spring kit
9. Not Recommended for Suburban / Yukon models with AutoTrac Transfer Case
10. Does NOT work with rear Autoride equipped SUV's
11. For coilover conversion kit, see instructions for fitment on gas models

Lift Height
Front (Base Kit): 4.5 in High Clearance IFS
Rear (Base Kit): 3 in Block Kit

Tire and Wheel Combinations
2001-2007 Classic Body Style
33" x 12.50" w/16 x 8 and 4-1/2" back spacing
35" x 12.50" w/17 or 18 x 9 and 5.5" back spacing
35" x 12.50" w/20 x 9 and 5.75" back spacing
2007-2010 New Body Style
33" x 12.50" w/16 x 8 and 4-1/2" back spacing
33" x 12.50" w/17 or 18 x 9 and 5.5" back spacing
33" x 12.50" w/20 x 9 and 5.75" back spacing
*Trimming may be required*

Make Model Type Year Range
Chevy / GMC 1 Ton Pickup 4WD 2001-2010
Chevy / GMC 3/4 Ton Pickup 4WD 2500 HD 2001-2010
Chevy / GMC 3/4 Ton Pickup 4WD 2500 NON-HD 2001-2006
Chevy / GMC Avalanche 2500 4WD 2001-2006
Chevy / GMC Suburban 3/4 Ton 4WD 2001-2010
Chevy / GMC Yukon XL 3/4 Ton 4WD 2001-2010

Difficulty Level (1 easy – 5 complicated): 4
Estimated Installation Time (hours): 8-10

Instructions
PDF (click here)
Qty Part# Description
(1) 011319 01-10 GM HD 3in Rear Kit
(1) 021441 01-10 HD Coilover System Box Kit (1of2)
(1) 021442 01-10 HD Coilover System Box Kit (2of2)
(1) 021632 Standard HD Knuckle Kit
(1) 121252 01-10 HD UCA Kit
(1) 121624 HD Front Skid Plate
(1) 121654 01-10 HD Coilover Mounting Kit
(1) 88406187 Kit: BDS 01-10 GM 2500/3500 HD Front Coi
(2) 98224759 Fox 2.0 Shox 29.8 x 12.6 x 2 -EB1-EB1

*Subject to change based upon selections

No Fine Print Warranty
BDS stands behind its products and that’s evident by their No Fine Print Warranty. This no-BS warranty protects the original purchaser against breakage, bending, sagging, or any other usage failure. This “no fine print” lifetime replacement warranty extends to cover all BDS hard parts as well as bushings. Exclusions would be product finish and wearable items such as shock/stabilizer cylinders, tie rod ends and ball joints that would fall under the separate Limited Lifetime Warranty policy. Beginning February 1, 2020 all new kit purchases include the No Fine Print Warranty on bushings.

Limited Lifetime Warranty (for wearable items)
Wearable items include shock/steering stabilizer cylinders, ball joints and tie rod ends. BDS Suspension Co. warrants to the original retail purchaser that its these wearable parts are free from defects in material and workmanship for so long as they own the vehicle. Excluded from this warranty are the finish of the product. Defects in material and workmanship do not include such things as dented cylinders or bent rods caused by obvious side impact, rust or corrosion. A shock absorber is a wear item and over time will experience diminished damping resistance due to normal component wear. This is not a defect in material or workmanship and is therefore not warrantable.