Ordered a serpentine belt for the F150 back in June. Didn't get around to putting it on until last week. Guess what? That belt wasn't even close to what it should have been size wise, way to short. So I emailed them and they said basically, sorry....we have a 30 day return policy. Now, I can understand that, but come on.....if you sent me the wrong part, shouldn't that be considered also? I've never got anything from rockauto that wasn't the right part, hence, I didn't think I had to double check it and it's kind of hard to without taking the old belt off. Kind of bent they wouldn't work with me and I've bought lots of stuff from them. Just letting ya'll know, check you parts if you're not going to use them anytime soon.