Durable Replacement. Take your suspension kit to the next level with Rough Country's Heavy Duty Replacement Ball joints. These ball joints feature a Polyoxymethylene ball race with an extremely low coefficient of friction for longer life, and a larger ball diameter to improve the range of motion with a maintenance-free design. Each ball joint is fully greaseable.\Installation. Rough Country's Replacement Ball Jointsoffer a 100% press-in installation estimated to take approximately 1-2 hours depending on vehicle condition.\One Year Warranty. Rough Country's Replacement Ball Joints are backed with a 1-year replacement warranty towards manufacturer defects. As such, the product is protected from structural and workmanship damage after the date of purchase. With our industry-leading warranty give yourself peace of mind when using Rough Country's Suspension products!