Tuff Country 01-10 Silverado 2500HD (Grn/org/Wht TB) 4x4 & 2wd 2in Lvl Kit Frt (No Shocks)Tuff Country's torsion bar keys are designed as an easy solution to level trucks with factory torsion bars. These replacement torsion bars reindex the factory torsion bars which lifts the truck without cranking up the factory torsion bars. This Part Fits: Year Make Model Submodel 2001 2005 Chevrolet Silverado 2500 HD Base 2001 2006 Chevrolet Silverado 2500 HD LS 2001 2010 Chevrolet Silverado 2500 HD LT 2007 2010 Chevrolet Silverado 2500 HD LTZ 2003