In my opinion keep the stock filter until it NEEDS replaced. You won’t see much of a difference, if any at all, and the stock filter flows and filters air relatively well, there is no reason to throw out a good filter...after considering this option my self and reading some of the threads posted by others I think that most of them would agree with this response, but I have been wrong before. :Wedgie:
filter need changing, I would rather change it with something I can clean, rather than throw it away and spend $40 each time. but if you do the math it almost works out the same.
How much louder will it wistle??
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