Differential Diff Drop Kit fit for Chevrolet Silverado GMC Sierra 4WD 2001-2010 64849255Description: Diff drop kit is in its name, it's usually a bolt on kit that drops your vehicles front diff that helps in reducing the angle of your vehicles CV once lifted or raised. A diff drop kit is a kit full of spacers or brackets that once fitted prevents unnecessary wear to your vehicles Application : For Chevrolet Silverado 4WD 2500HD 2001 2010 For Chevrolet Silverado 4WD 3500 2001 2010 For Chevrolet Silverado 4WD 3500HD 2007 2010 For GMC