I have a 2004 1/2 diesel and not sure what gauge to get and i really dont one that feeds diesel in the cab but want the gauge in the cab. I know they are more $$$$ but any help would be great and also where on the common rail trucks do u hook these up to.

 

quadzilla has a rp and fp gauge combo for less than $200

brett

 

most guage kits come with an isolater so diesel does not go the into cab but antifreeze fills the line to give you fuel pressure reading easiest way to hook it up is use a banjo bolt on the bottom of your fuel filter housing

 

I have a dipricol fuel pressure gauge. Ive ran it in 2 trucks and its about 3 yrs old. zero problems out of it. I would buy another one in a heartbeat.
it wasnt cheap but it was worth the $. my buddy had issues from his isspro, it lasted a year tops