Hello everyone. Looking for some help. I have a few questions...

1. I have a 2014 F250 gas and I am about to have a 6" Rough Country lift with 35s. Is there a programmer or something i need to let my truck systems know I'm running bigger tires to prevent speedometer from being off or messing up the mileage?

2. Anyone have opinion on the Federal Couragia M/T tires?

3. Anyone know where I can order an override switch for the NAV and make my indash play DVDs?

Thanks in advance.