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the above statements sound like a filter test not a dyno test. I understand what your getting at but if the filter says it flows x amount of air that is what it flows. you can look it up I'm making jerky.
I believe the OP was referring to the limit of the intake system (bottle neck) would be the 3" tube, as the filter is capable of flowing MORE air than the tube. So, regardless of what hi flow filter is used, the restriction is the same.
I believe the OP was referring to the limit of the intake system (bottle neck) would be the 3" tube, as the filter is capable of flowing MORE air than the tube. So, regardless of what hi flow filter is used, the restriction is the same.
I hate to burst everyone's bubble, but a 20 HP gain on 400 is only 5%. There could easily be a 3-5% margin of error between tests.