Donald E.
oil cooler and egr cooler
I have oil cooler and egr cooler. So far so good at 15,000 miles on them. I trust that both will work out alright. As other OEM parts fail, I will likely replace with Bullet Proof. Bullet Proof tee shirts should be 100% cotton and heavier. Probably O.K. for Arizona heat, but not for cooler climates.

