4 inch Lift Kit with FOX 2.5 Coilovers & Block Kit - Aluminum

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.

Factory Control Arm Type

GM is producing several knuckle/control arm configurations in 2014-2018 models trucks. Cast Steel control arm equipped models will require the "Cast Steel Control Arm" kit. Stamped Steel and Aluminum control arm equipped models will require the "Aluminum Control Arm" kit. Be sure to verify which factory control arms your truck has before ordering by referencing the help images in each tab below.

Rear Lift Option

Rear 5 Inch Block Kit

• The 5" rear block replaces the factory 1-1/4" block
• Nets 4" of rear lift to level the vehicle.
• Made of cast iron for high strength.
• Designed to provide correct pinion angles.

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

Recommended Tires & Wheels

• 33 x 12.5 with 17 x 9 and 5 in. Backspace
• 33 x 12.5 with 18 x 9 and 5 in. Backspace
• 35 x 12.5 with 20 x 9 and 5.75 in. Backspace

Fitment:

2014-2018 GM Sierra/Silverado 1500 4WD with Aluminum or Stamped Steel Factory Control Arms

Important Note

1. Strut compressor required
2. Requires frame bracket modification
3. Requires differential modification to clear electric power steering
4. Vehicles came from the factory with several knuckle/control arm configurations requiring specific kit selections. Be sure to reference the important notes and images above to determine the correct control arm selection for your application.
5. Factory 17" and 18" wheels cannot be reinstalled due to tie rod end interference
6. All wheel drive models require drive line modification.

• 2014 Chevy 1500 4" Rear Block Kit (011405)
• 2014 Chevy 1500 4" Frt Box Kit (1of2) (021462)
• 14-18 GM 1500 - 15-19 GM SUV Knuckle Box - Alum/Stamped (021661)
• 14-18 GM 1500 15-19 GM SUV 6" Frt Box Kit (2of2) (021663)
• Kit: BDS 07-18 GM 1500 Front Coilover, 2.5 Series, R/R, 4" Lift, DSC (FOX88306135)
• Fox 2.0 Shock 30.05 x 18.45 x 2- EB1/EB1 (FOX98224759 x2)