2005 6.0??
 

I've heard alot about that the 2005 6.0's are the worst Outta them all I was wondering y?

Because Ford/International-Navistar hadn't worked out the bugs with the engine. They had a LOT of EGR problems, turbo problems, head problems. In my opinion the EGR setup that is on the 6.0 is the worst design ever, I mean seriously how smart is it to have standard engine coolant go through a unit that has 1000°+ exhaust gases going through it?

I don't think they're that bad. 05 was the year that they changed the design of the HPOP. They all came with a 2 piece fitting that would blow the o-ring out and leave you with a no start.

If you take care of the EGR and the STC fitting. You'll be well on your way to having a good truck.

2005 6.0??
 

Ok so the only difference is the hpop?

The rumor was often the 05 had the worst HPOP, but ask Shaun Ellerton about it on his 1000+RWHP truck, still running a stock 05 HPOP. (He's probably closer to 1200rwhp).