Compatibility: This 2-4 inch front upper control arms fits for 2001-2010 Chevry Silverado 2500HD 3500HD, 2001-2010 GM Sierra 2500HD 3500HD，2003-2009 Hummer H2. Material: The front upper control arm with ball joint assembly is made of high-strength steel with solid mounting bracket.The 2001-2010 chevy silverado 2500HD with ball joint provides rotary movement between the steering joint and the control arm, providing safe and smooth driving. Features: The special design of the ball joint spindle head of the 2-4" lift control arm aids in mounting and dismounting, providing better stability and reinforcing the structure. Urethane bushings enhance drivability and the high quality ball joints with pre-installed dust caps reduce internal wear caused by dirt and water, greatly extending the life of the control arm. Easy to Install: Suspension tubular arms with ball joints are perfect for replacing old or damaged automotive control arms, wear-resistant and damage-free, no drilling and cutting required, and all parts are pre-assembled for easy installation, dramatically reducing your installation time. After-Sales: If you have any questions, please contact us, we will reply you within 24 hours. Fitment: 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 Silverado 2500HD,2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 Silverado 3500HD,2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 GM Sierra 2500HD,2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 GM Sierra 3500HD 2003 2004 2005 2006 2007 2008 2009 Hum~mer H2 Content：2pcs/set and all parts included as pic shown in padding box(ball joints pressed in) Front Upper Control Arms with Ball Joint Compatible with 2001-2010 Silverado GMC Sierra 2500HD 3500HD 2-4" Lift Adjustable Control Arms The Upper control armsare an upgraded version of the original parts and are perfectly compatible with the original wheels. Replaced better OEM control arms that lift the vehicle 2-4 inches. Perfect to replace your old or broken car control arm,wear-resisting durable and undamage,No drilling and cutting required,All parts have been preassembled,Easy to install. The front upper control arm with ball joint assembly is made of high-strength steel with solid mounting bracket. Unparalleled strength and durability, no welding weakness. The anti-corrosion coating on the control arm of the upper limb before 2-4 "lifting can prolong the service life and prevent rust. All the zerks can fill in grease after some use (pre-greased when you get it High Quality Rubber Our products are made of high-quality rubber, which is more suitable for low temperature and durable, improves maneuverability and service life, and is more suitable for harsh high and low temperature environments. Longer Service Life Pre-greased Ball Joint Assembly Solves The Friction Problem, High Hardness With Heavy-duty. Protective Cover Equipped with protective cover to prevent silt from entering the ball joint and prolong its service life PU Bushing and TIG Weilding 1. The PU bushing instead of rubber bushing, improve maneuverability and Service life, and more suitable for harsh high and low-temperature environments