how many Db is a stock exhaust system on a honda crf250?
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I found the following website that has what I think is the information you are looking for. I hope this helps. * db level: DRD 99.2db, Quite Core insert 96db (Quiet Core sold separately) (Dirt Bike quoted the db level to be 92.18 with insert installed) Stock 96db I'm not sure if this document will help you any or not. It has a chart that shows a chart listing 'Akrapovic Evolution Exhaust System' and it has the dB/rpm as 98/5500 and I listed that site 2nd below. I hope this has been at least a little help.