The Superlift Fox shock box for 2001–2010 Chevrolet Silverado/GMC Sierra 2500 HD supplies front and rear Fox shocks specified for 4–6in lift kits and is offered as the matching four-shock set for those model years. The product listing identifies the Fox shock fitment and mounts for front and rear applications and includes the warranty detail noted in the source.
Superlift 01-10 Chevy Silverado 2500HD Fox Shock Box - 4-6in Lift Kit Front and Rear Shocks