Pacbrake Alpha HD PRO Rear Air Suspension 2001-2010 Silverado/Sierra 2500 HD/3500 HD

Designed for durability and performance, the ALPHA HD PROTM Series comes with Jounce Bumpers/Bump Stops, a flexible polyurethane bumper inside the bag that prevents bottoming out, which could damage your air springs, and allows you to run your bags at 0 psi when unloaded for factory ride comfort.