Actual sound and perceived noise are definitely two different animals. I rode the bike down the street and my son said when I was 3 houses away he could no longer hear the exhaust just the chain slap. So it cuts db in the J1287 test (not a real good representation in my opinion, but at the moment it's the only repeatable test standard we have) plus it minimizes perceived noise which is much more important to me. In my opinion well worth the money.
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