Really, I kept reading in different types of DSM forums that I needed to stay away from the local warehouses. I don't know the true reason why, but some said it was the bore size and some said it was the quality. If there's enough people saying the same about a part issue, I tend to think they are onto something. I would highly suggest doing some research if your willing to spend a bit of time. I did. Haven't had a problem with my part from Rockauto/AMS. I had this problem and had no idea how to deal with it until I researched it.