the first thing to get is a diesel particulate filter delete and a custom tuner as this will substantially help your fuel mileage and power, these trucks are making 600hp on this upgrade and a good intake, u HAVE TO HAVE A CUSTOM TUNER WITH THIS MOD, the tuner will shutoff the regeneration process of the DPF and is very important. i will post some links later for some good places for custom tunes later, with custom tuning it comes down to preference as all of the big names are good but have different styles for shift points, fueling, timing, shift firmness and most will tune it to what ever you request.
P.S. most tuners now have it where u can buy tunes online and have them emailed to you so you dont even have to send them in anymore

 

great post Mid MO....I look forward to your future posts

 

http://dpfdeletekits.com/spartan-pha...ke-diesel.html
i talked to my friend how has a 6.4 and he says the spartan is the way to go and yes it is expensive but he says it is worth every penny, there is also sct tuners that you can get with innovative tunes or h&s blackmax tunes both of which are pretty good and cheaper.

 

Hey Mid Mo Thanks for your help.I thought you are the one who will ask the question but you actually answered your own questioned.I am having a problem with my car,I dunno if it is because of not enough diesel,my car stop after a using that for about 1-2 hours.