I have a 2004 F-350 king ranch 2wd completely stock except for bullydog tuner...I dont hot rod it just use it for help in pulling, monitoring, and better mpg. I have right at 140,000 miles and I have not ever had an issue with it. I have just been very maticulous on maintenance. Is there anything I should invest into like studs, egr delete? I want this thing to last another 100,000 miles, any ideas?

 

If I had a 6.0L a coolant filter would probably be my first mod.