Factory Warranty?????????????

[hopakey]

New Member. GREAT to be Aboard. Just purchased 04 Excursion with 26,000 miles. Have several questions looking to improve MPG and HP
1-Just noticing so many "Chip Programing" manufacturers, makes and models. Which one is the best?
2- Once purchased do you have to have programed. I noticed in magazine companies like "DJ'S Tunes". If have to a programed by outside source which is best company?
3- Last but not least. My engine is still under warranty. Installing the above mentioned items, will this void my warranty?
As my first vechicle diesel, would appreciate the come back.
Hopakey

[redstroker_2002]

welcome to the .org great to have ya. my best advise is to search the forums what your looking for and try to find it cuz there is so many options for these motors and its really personal preference.