I don't think we have a dyno plot yet of just the Nismo intake posted in here. I have not done it yet. But I also have Berk HFC's so when I get the exhaust and tune I'll get a before and after dyno run, but its going to include the cats. Given the general tolerance in dyno runs, I would expect the Nismo intake to be close to the Stillen. I suppose one could measure the diameter of the intake tubes and if the Stillen was a lot bigger it might generate more HP. Then you have to consider the area of the filter elements and the filter media.....that's too much math and thermo for me.
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