I am going to get a performance intake for my 6.0l PSD. There are four companies that make products for my truck:AFE, K&N, Airaid, and Greenfilters. Price isn't much an issue so, does anybody know wich one would give the best over all performance?

I would suggest looking at The DieselStop.com They discuss everything you would ever want to know about every performance upgrade for Ford/International Diesels.

M3, i dont know who you think you are but you dont even own a truck man! jk, hey this is my first post bro.