Life of a NAPA 6637

Bean

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Not sure what is up with the rated cfm # but we have tried it on several different trucks anywhere from clogged looking filter to clean filter and it makes 0 difference in hp between no filter and having a 6637 on it. Thats the type of info I trust more then a cfm # on a piece of paper.
 

Tonka350

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I've had mine on for almost 2 years now.......I have a riffraff sock on mine though but I haven't touched it. I've looked at it.........and put it right back in. it's still perfectly clean...I've put almost 40k miles on in 2 years also.

Chad
 

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