i bet you are the same bunch of idiots standing in line fussing at the 17 year old behind the counter about the price of diesel. i said before and i'll say again, the dealer does not set the prices. the manufacture does. same way as the vehicle. if a dealer can sell all the trucks it can get at sticker price, why would it discount one to you? if your time and expense to drive to a couple of hours and back is worth the amount of savings then so be it. supply and demand (economics 101)
as for you viper, yes i am a mopar fanatic, but i have sold parts for gm, hyundai, mopar, isuzu, and mercedes so its not really my precious dc. you seem to be one who purchases on price only, therefor your not a customer that can be retained anyway, so go buy your cheep parts and enjoy the savings.
as for the oil filter, mopar buys them from fleetguard in a mopar box. again, someone elses product being marked up and sold by a middle man. (you guys really need some economics 101). but still i sell mopar diesel oil filters #5083285aa all day long for $12. 70. i dont know what you bought and why it was so much.
towards the factory vs centerline, i seriously doubt the aftermarket replacement has the r&d to exact fit you truck like the original engineers did. i'm not saying all aftermarket products are inferior (they're all over my trucks), but i do know if you purchased the dealer part, it will fit and operate the way the truck did when new.