BDS 4 Inch Lift Kit | Block Kit | FOX 2.5 Performance Elite Coilover | Cast Steel Control Arms | Chevy Silverado / GMC Sierra 1500 (2014-2018) 4WD

Configured with a rear block kit and FOX 2.5 Performance Elite rear shocks for the Cast Steel control arm front suspension. The 2.5-inch impact-extruded aluminum body features an external reservoir, massive 7/8-inch hard chrome-plated alloy steel shaft, and a DSC (Dual Speed Compression) adjuster for precise terrain, load, and speed tuning. Fully serviceable design.

Overview

This BDS 4-inch lift kit is designed for 2014–2018 Chevy Silverado and GMC Sierra 1500 4WD trucks, providing clearance for up to 33-inch tires. The kit uses a high-clearance design to improve ground clearance, strength, and off-road protection while correcting suspension and steering geometry for on-road handling.

Up front, the kit includes full-length replacement strut shocks, high-arched 1/4-inch-thick steel crossmembers, multipiece differential relocation brackets, and heavy-duty skid plates. Steering geometry is corrected at the new ride height with CNC-machined ductile iron steering knuckles. Sway bar drops, bump stop extensions, brake line brackets, CV spacers, and all necessary hardware are included. In the rear, buyers can choose between replacement lift blocks or full Glide-Ride leaf springs, paired with new U-bolts, brake line brackets, and either FOX 2.0 Performance Series or FOX 2.5 Performance Elite rear shocks.

Features

• FOX 2.5 Performance Elite or FOX 2.0 Performance Series shocks designed for increased travel and off-road capability
• DSC (Dual Speed Compression) adjuster on FOX 2.5 Performance Elite shocks for versatile and precise tuning
• High-clearance 1/4-inch-thick laser-cut steel crossmember design maximizes ground clearance
• CNC-machined ductile cast-iron steering knuckles maintain ESC system compliance and correct steering geometry
• Heavy-duty skid plate system bolts together to create a rigid subframe with added off-road protection
• Multipoint differential relocation brackets secure the front axle and improve CV angles
• FOX Performance Series IFP gas rear shocks for improved ride and off-road performance
• Factory Protection Plus drivetrain warranty included
• Rear options: replacement block kit or Glide-Ride multi-leaf progressive leaf springs

Specifications

• Lift height: 4 inches front
• Rear lift: 4 inches (block kit or Glide-Ride leaf springs)
• Tire clearance: up to 33 inches
• Crossmember thickness: 1/4-inch steel, laser-cut
• Steering knuckles: CNC-machined ductile cast iron
• FOX 2.0 Performance Series: 2-inch impact-extruded aluminum body, internal floating piston (IFP) monotube design, CNC-machined 6061-T6 aluminum mounting ends, 5/8-inch hard chrome-plated heat-treated alloy steel shaft, race-developed high-flow piston, application-specific valving, clear anodized finish
• FOX 2.5 Performance Elite: 2.5-inch impact-extruded aluminum body, external reservoir, 7/8-inch hard chrome-plated heat-treated alloy steel shaft, DSC Dual Speed Compression Adjuster, fully serviceable, 1-year manufacturer's warranty
• Glide-Ride leaf springs: multi-leaf progressive design, cast-iron block, corrected pinion angles, maintains factory payload weight ratings, reduces axle wrap

Installation

• Estimated Time: 8–10 hours
• Difficulty: Difficult
• Tools Required: Cut-off wheel or equivalent, reciprocating saw, strut compressor, welding equipment

Important Notes

*IMPORTANT*: GM is producing several knuckle/control arm configurations in 2014-2017 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 our help images when customizing your kit. Requires frame bracket modification. Requires differential modification to clear electric power steering. Factory 17" and 18" wheels cannot be reinstalled due to tie rod end interference. If choosing the 5" rear block option, add-a-leaf # 111209 is recommended for a more level/tail high stance on crew cab models. All wheel drive models require drive line modification. Will not fit MagneRide magnetic ride control equipped models.