Reply to "K&N air filter for Duramax Diesel- Yes or No"

NutmanLOA's GRANDMASTER OF WRONG TURNS King of LOALifetime Member

I’ve used K&N filters back in the 1980’s/1990’s in Jeeps. I learned they are less restrictive than paper filters, and they filter best the dirtier they get. Using them I could never really detect any performance gains. I stopped using them after I noticed a fine film of dirt in the throat of several of the various Jeep carburetors, which was an indication that they were not functioning well to prevent dirt from entering the engine.

Based on my experience I would recommend against using K&N filters. A OEM filter or a quality aftermarket paper filter will likely provide the best protection for an expensive diesel engine.

3/10/241:09 PM

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