I bought these upper arms for my truck and waited to fit them until all the parts were in place up front. Once I installed them all went well until it was time to fill the ball joint with grease. When I filled it about halfway, grease started pouring out of the hole in the trunk, and the hole on the passenger side was slightly larger because so much more was leaking out. The part itself is well made but the boots need some work. Now to the fact that I was waiting for other parts to arrive. I don't go into the returns window and have no way of replacing them.