Christian...awesome post!

3 engines in an 10' I doubt it, if so, sounds like your friend is screwing something up or whomever is doing the installs doesn't know what their doing. Bunch of 6.0's and 6.4's in the fam with no trouble, most are modded. And friends 6.4 is running 120K now with mods and dpf delete, tows non stop, no problems.

I saw a test in Diesel Power where a 6.4 made 600hp with a tune, an intake and an exhaust change. I dare say not even the vaunted Cummins can boast of that.