i've noticed that the purolator fuel filters at advance are poor quality, either missing endcaps, copper washers, or lopsided.
i, like a dummy, purchased a spare one without looking in the box and ended up with a lopsided one. i've had it for longer than 30 days, so i dunno if i can get a replacement (i'll probably call purolator).
when i asked a friend to check the rest of them, he let me know that they were all like that.
horrible.
the filter for my van was great quality though.
wierd.