what would be your 1st mod that you would do for a 5.9 07, 4x4 that will be used for towing and long road trips? thanks and happy holidays

 

gauges first and foremost. Then worry about turbos, exhaust, fueling enhancements etc...

 

that was my guess, would you get a fuel pressure gauges or a tranny temp gauge for a auto?

 

both, its nice to monitor key things, espically when traveling. Towing its nice to watch your tranny temp, fuel pressure even shows you if your filter is getting clogged if placed in the right place. then exhaust temp for pulling hills, boost for checkin in on the turbo.

 

My first mod was gauges, pics are in my gallery. Second mod was a Glacier 392 Perf fuel system with a 2 micron filter and big line kit. This really made the truck idle smoother plus I have the extra 2 micron filtration. Third was Smarty.