I laugh at how so many people put pressure on them when they install,....then heat distorts them ..they fail and you guys blame the elbow.
I'd bet this is an installer error.
So dorman admitted their product is defective, but its still user error?
I've never had issues with elbows until I installed the most recently acquired plastic set a month ago.
In one month the upper had warped away from the LIM, when it was installed, it was in place and you could wiggle it around.