Thanks for the comments & advise. Although using K & N filters on my previous vehicles, I think I'll give it a miss on the D4. Too many hard earned $ to take a chance for a few extra Kw that I don't think is needed on the 3.0Lt anyway.
I also agree that the higher air intake maybe better for deep water crossings, but in thick dust, there is probably not much difference.
More opinions welcome, but at this stage stock is the go.
Cheers, Craig

