gsbrockman
TDR MEMBER
There's several 6.7L's / 68RFE combos used by RV hauling O/O that are into the 400k---500k---600k mileage ranges.....with nothing but regular maintenance done to them.Stock 5.9's with less than 250K miles rarely have head gasket issues, but 6.7's are a different breed. The Siamese design if the cylinders is far harder on headgaskets even in stock form. Deleted and tuned without studs can decrease the life drastically.
Saying something doesn't fail is too extreme, it's rare but does happen.
