powercore with megabomb headers

I was wondering if anyone knows what the db output would be on my 07 yz450f if i put a powercore silencer with megabomb headers on it. Also what the db output would be with the 4.1 silencer and megabomb headers.

I dont know about the db, but if I had it to do over I would buy the q series. My powercore isnt that loud but I wish it was a little softer.

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