they do run it without air filters.....
if any of you have wathced the Best motoring Int. with the supra vs. rx7, vs skyline vs. sylvia.......the other part of the video shows other tuner cars...one of them had ITBs....they did not put in a filter to run it.
also remember the MTV thing with the Streed Racing??? the guy was running the ITBs...he was showing his engine before he was racing,....then he raced...without putting any filters on...
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