Filter minder put on my Ram Hemi airbox

So it’s over a year later and at least 30k miles and the indicator has not moved at all. Might be leaving the filter in for a lot of miles lol.
 
So it’s over a year later and at least 30k miles and the indicator has not moved at all. Might be leaving the filter in for a lot of miles lol.
That model has a pretty high pressure range. A new air filter might have a restriction of 1-2"H2O, and changing the filter at the minimum reading of 8" would be pretty reasonable, which equates to 2% of atmospheric pressure, so a 2% drop in airflow and engine power. Pressures much above this can reduce filter efficiency due to particle shedding, and high pressures are also bad if the filter doesn't have a perfect seal. I certainly wouldn't let it get above 11".
 
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