Intake Silencer?
#1
#5
Stands to reason that it is. You wont notice the difference at idle, but it should be more pronounced up at 4k and above. Probably silences a particular set of frequencies at a particular rpm range.
#6
Probably is like previous poster noted you won't notice it at idle you... you do hear it when you let off the throttle though... it will sound a little like a jake brake kicking in, kind of cool IMO...
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kawazx636
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