Rough Country 3.5 INCH Suspension KNUCKLE KIT | CHEVY/GMC 2500HD

Rough Country Latest 3.5" Knuckle Suspension kit for your Chevy Silverado 2500HD or GMC 2500.

Improved Ground Clearance and Ride Quality. Take your workhorse to the next level with Rough Country's 3.5" Knuckle Lift kit. Rough Country's 3.5" Knuckle Kit provides an improved ground clearance and is designed for on or off-road driving. This suspension features Vertex adjustable coil-overs. Other kits can be supplied but we highly recommend the Vertex range for this type of vehicle.

Innovative Design and Construction. This suspension kit combines the use of durable steel knuckles and forged upper control arms to reduce cv angles and ball joint angles. Featuring a set of forged torsion bar keys that offer uncompromised strength and rigidity gaining lift height is no issue. Utilizing our forged upper control arms and differential drop spacers this kit allows you to retain factory-like geometry and provides enough clearance to run 35" tyres with appropriate wheel backspacing and minor trimming.

Installation. With no cutting or drilling required to install, installation couldn't be easier. With an estimated timeframe of 4-6 hours this full kit can be installed at home using standard tools and can be completed efficiently and quickly.

Vertex Suspension Features

  • 8-Stage Adjustable Damping
  • Monotube Design
  • Nitrogen-Charged
  • Massive 2.5in Piston
  • 3-Stage Seal System
  • Heat-Treated, Alloy Bearing
  • 3-year Manufacturer's Warranty

Whats in the Kit


  • Forged Torsion Bar Keys
  • Upper control arms
  • Lifted Knuckles
  • Differential Spacers
  • 2 x Vertex Remote Reservoir shocks.


  • Lift Blocks
  • U-bolts
  • Hardware
  • 2 x Vertex Remote Reservoirs shocks.