I ran a second hand aFe on my old 7.3 PSD for over 80k in dirty and dusty conditions without any problems, no telling how many miles it had before I got it. Intake was always spotless even when the filter was dirty. Just clean it and you'll be fine. I was so happy with it I bought another one for my Dodge.How's the AFE for filtering? Without getting into a years old back and for argument, I do not care for K&N drop ins. I've been looking at WIX or NAPA Gold but unsure if they make one for the 6.7L.