The Mega Ball Joints are used for our mega ball joint a arm. They will not fit a regular a arm.
These ball joints are for rzr only (XP, TURBO, RS1, PRO XP, TURBO S, PRO R, TURBO R, PRO S). They do not fit a general or Ranger. 
 These ball joints have a hardened body and stem. Stem is built from AMERICAN made 4340 and hardened for maximum strength and wear resistance. Adjustable and greaseable with a replaceable boot.