Usually, when you lift 2.5 or more of your truck, OEM control arm would limit suspension travel, which will impact the driving performance. The KSP leveling kits will solve the problem. Please tighten the zerk at any direction after refilling grease.DO NOT use excessive force to prevent copper zerk broken. All the zerks can fill in grease after some use (pre-greased when you get it). 1 pair kit and hardware as shown in picture. PU Bushing Better Than Rubber Bushing. TIG welding supply better stable and reinforced structure than MIG welding. Tower Type Dust Cover(Longer Service Life). CNC Machined Bushing Housings and Sleeves. Constructed from 1.25 DOM tubing for superior strength and durability. CNC Machined and red texture finish of the control arms give your vehicle an aggressive look. Welcome to discuss bulk order or customize parts. The item "Upper Control Arms For 2-4 Lift Kit For 2001-2010 Chevy Silverado GMC Sierra HD" is in sale since Thursday, March 25, 2021. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts & Accessories\Steering & Suspension\Control Arms, Ball Joints & Assemblies". The seller is "ksp-suspension" and is located in CA,KY,TX. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, Sweden, South Korea, Indonesia, Thailand, Belgium, France, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Malaysia, Brazil, Chile, Colombia, Costa rica, Panama, Trinidad and tobago, Guatemala, Honduras, Jamaica, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Montserrat, Turks and caicos islands, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Ecuador, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Viet nam, Uruguay.