I just got an 07 Ram with the 4.7l; I put a K&N air intake and filter in my 2008 trailblazer a couple of years ago and am happy I did. I am wondering on this truck (since it is my second vehicle that will get less miles on it) if I need to go through the same expense.
I have noticed on ebay there are some cheap "intakes" that are just basically a filter and smooth tube. Some of them, ie. this one: http://www.ebay.com/itm/02-03-04-05-...ht_5529wt_1161
even come with a K&N filter (which would probably be better than the cheapy filter on the other kits).
I am just curious what some people's opinions are on going the cheap route on an air intake? I could leave the factory intake in but would like to get a bit of a better sound if at all possible. I also noticed better fuel economy after putting a K&N kit in my trailblazer.....