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- BarryG20ExplorerI have been using Fleetguard's for over 20 years and over 1/2 million miles with no issue. Fuel, oil and air filters in my Cummins powered truck.
I personally would never run a K&N on a diesel truck. The stock filter is more than capable of providing enough air. - fj12ryderExplorer IIII pitched the K&N that was on mine when I bought it. IMO a diesel flows so much air the K&N needs to be thoroughly, and I do mean thoroughly, cleaned often. The one I pitched had crud deep down in the pleats. I replaced it with a Donaladson BHAF. This is on a 2001 Cummins.
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