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Does anybody have a napa 6637 air filter intake system on their truck. If so does it restrict the airflow at all? I put the stock flow restriction guage in mine and it is reading that it is 75-100% restricted when i step on the throttle? Am i doing something wrong??:smoke
 

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I had one for a while but didn't like the noise. I can hear my turbo plenty loud with an airbox on it. You might check you filter minder with an vacuum pump that has an accurate gauge, the minders do wear out eventually. Well, not really wear out but they do become lazy.

Did you have a change in smoke or EGT? If no change then I wouldn't worry about the filter minder. If your EGTs went up or you see more smoke then I would look into air flow more.
 
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