Zone Offroad 2" Torsion Key Leveling Kit 11-19 GM 2500HD / 3500 SYN-8555-30-HD use the supplied spanner wrenches

use the supplied spanner wrenches at the axle to loosen the jam nut

Keep your rear sway bar within factory tolerances by replacing them with Carli's Adjustable Rear End Links

OPTIONAL EXPANSIONS

you will need a different gearbox

Zone Offroad 2" Torsion Key Leveling Kit 11-19 GM 2500HD / 3500 SYN-8555-30-HD use the supplied spanner wrenchesLevel the front end of your 2011 2019 GM Duramax with the Zone off road 2" leveling kit with 2" rear block kit. This kit gives you the ability to fit up to a 34" tall tire all while retaining the tail high look. This kit features castings that are resonance frequency tested to ensure they are defect free and ready to withstand any abuse.