Important Notes
- Strut compressor required for installation
- This system will not fit 2007 classic models
- Installation of rear leaf springs requires removal of the fuel tank
- Requires frame bracket modification
- 20" wheels with 5" to 5-3/4" backspacing recommended to reduce trimming.
- Traction bars will not fit regular cab short box models.
- Add 121651 Auxillary Differential support bracket for AWD models. Also may require front driveline modification.
- Will not fit two-mode hybrid models with electronic power steering.
- Stock 20" wheels can be re-installed only with factory tire size. Factory 17 and 18's cannot be re-installed.
Features & Benefits
- FOX 2.5 Factory Race series coilovers for improved ride quality, performance, and capability
- High clearance crossmember design maximizes ground clearance
- Robust steering knuckles maintain ESC system compliance
- HD skid plate system improved offroad protection
- Multipoint differential relocation brackets to secure the front axle and improve CV angles
- Factory Protection Plus drivetrain warranty included
Upgrade the performance and capability of your 2007-2013 Chevy Silverado and GMC Sierra 1500 trucks with 4-inch coil-over suspension lift kit by BDS. These kits feature proprietary FOX 2.5 coil-over shocks designed specifically to bolt-on performance for increased travel and the ability to soak up the roughest terrain along with smooth on-road comfort.
This kit takes advantage of BDS's tried and true high-clearance design for improved ground clearance, strength, and offroad protection while correcting suspension and steering geometry for great on-road handling characteristics. Up front, the kit utilizes high-arched 1/4-inch thick steel crossmembers along with a multipiece differential relocation brackets and heavy duty skid plates built for offroad protection. Steering geometry is corrected at the new taller ride height with CNC-machined ductile iron steering knuckles. These combined with the provided sway bar drops, bump stop extensions, brake line brackets, CV spacers, supplied hardware and more provide a comprehensive front suspension lift ready for whatever you throw at it.
In the rear BDS offers both replacement lift block and full Glide-Ride leaf spring options to lift and level that stance. The lift block installs in place of the stock block and retains ride quality and load capacity. Also for the rear are new u-bolts, brake line brackets and FOX 2.0 Performance Series shocks.
FOX 2.5 Coil-Overs
FOX 2.5 coil-overs offer next level performance for on-road comfort and off-road comfort capability. Tuned and ready to install right out of the box, these bolt-on 2.5-inch diameter coil-overs are built for abuse and packed with race-proven technology. They include a remote reservoir for additional fluid capacity to keep your shocks running cool so you can push the limits in the rough terrain.
DSC Adjustment
FOX 2.5 coil-overs are available with optional DSC (dual speed compression) adjustment to tune the high-speed and low-speed compression damping allowing for added control on-road with the ability to easily dial in more aggressive damping offroad. Tuning is a simple twist of the two clearly defined knobs with immediate feedback to dial it in for any terrain.
Recommended Tires & Wheels
(Trimming may be required)
- 32 x 11.5 with 17 x 8 and 4.5 in. Backspace
- 33 x 12.5 with 17 x 9 and 5in. Backspace
- 33 x 12.5 with 20 x 9 and 5.75in. Backspace
Coil-Over Option
FOX 2.5 Coil-Overs
- 2.5-inch smooth bore zinc plated seamless steel body
- Zinc-plated and double-clear coated for long lasting finish
- Black-anodized, CNC-machined 6061-T6 billet aluminum
- Application-specific, adjustable 3.0 Eibach® racing springs
- 7/8-inch hard chrome-plated steel shafts
- Application specific valving to maximize performance
FOX 2.5 Coil-Overs with DSC Adjuster
All the FOX Coil-Over Advantages Plus:
- Dual Speed Compression (DSC) Adjuster
- Increases both low and high-speed compression levels up to 25%
- Easy twist knobs for Low-Speed and High-Speed Compression adjustment
- Provides added control and comfort for on-road use
- More aggressive damping for use off-road
Rear Lift Option
5 Inch Block Kit
- The 5" rear block replaces the factory 2" block
- Nets 3" of rear lift to level the vehicle.
- Made of cast iron for high strength.
- Designed to provide correct pinion angles.
Leaf Springs
- Eliminates any need for a lift block.
- Reduces axle wrap and creates a more controlled and stable feel.
- Multi-leaf progressive design for a smooth ride.
- Maintains factory payload weight ratings.
