Gerrot Jacobson Tags: Air Filter, Dyno, The Tuning School, Tuning, Tuning Education -

How often do you change or clean your air filter? We took a stock 2500HD GM truck and set it up to do some testing for you. Testing the one-year old air filter against the brand-new air filter, versus cleaning the old air filter. As expected, their results told us what we should do.
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