Upgrade or replace worn ball joints on SPC Performance Adjustable Upper Control Arms with these modern architecture, maintenance-free, adjustable units. Designed, engineered and assembled in Colorado, these next generation ball joints are the result of a relentless pursuit of product performance and longevity. These ball joints are reverse compatible and a direct replacement for the SPC upper control arm sets. Features: Fully seated boot to keep grease in and contaminants out for a maintenance-free joint High strength steel forging with offsets provides camber & caster adjustability One piece polymer race tests like OE and provides low & smooth turning torque Oversized ball generates 80˚ of articulation with a 25% increase in neck cross section vs. OE for added strength Modern grease formula ensures quiet and smooth operation with reduced wear for extended life Extended threads on ball stud will work with most popular spindle gusset kits Fitment: Replaces Ball Joint on SPC Upper Control Arms - 25470 / 25540 / 25560 / 25660 Included: (2) Ball Joints Mounting Hardware Note: Direct Replacement