Sorry for the delay guys I wanted to find some of our old pictures for yall. The design of the factory control arm causes it to flex under heavy load (hard driving, tracking, etc) instead of at the bushing locations. This flexing of the arm causes the metal to fatigue from flexing (metal doesn't like flex back and forth) and eventually the arms fail under normal driving conditions.
After having our company cars arms tweak to the point that when they were installed on the car you could visually see the two arms were twisted in an unintended fashion, we removed them for replacement. Once removed it was noted they had become torqued during driving to the point they stayed in the bent position after being removed.
Dealing with trailing arm failure ourselves and noting a multitude of failures of customer arms, we tasked our R&D engineers with coming up with a better trailing arm.
Our arms are designed to eliminate twisting problem the factory arm has, being lighter than the factory arms is an added bonus. Our design takes the flexing under heavy load out of the trailing arms, and places it on the bushings were it belongs.
-James