7.5in GM Torsion Bar Drop Suspension Lift Kit (11-19 2500HD/3500HD)Right off the lot The GM 2500 HD has an impressive stance and a killer look, inspiring Rough Country to build a kit that would add crucial enhancements while taking nothing away from this sharp looking, new model truck. The 7. 5in N3 Suspension Lift for GM 2500 HD features a Torsion Drop Design for better ride quality and handling while maintaining proper angles in a factory fashion. This kit also features Heavy Duty components worthy of the HD badge;