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Re: Oiled Air Cleaners, Myth?
Posted to Technical Theory Forum on 3/16/2018 12 Replies

There were some guys who ran another series of tests between the K&N and the factory GM AC Delco filters on the Duramax. The end result was that the AC Delco filter filtered better, held more dirt, and flowed more with a high dirt load than the K&N did.

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