careful though.. the limit doesnt apply to peak revs, it applies to overall, and you will gain about 4dbA on back off (happened to me)
also, the limit is 90dbA not 95.
best bet is put your standard system back on, and you wont have any dramas. my 2.5" system was 87dbA at peak revs, and 94dbA on backoff (stupid manuals).. so yeah, get a stock system and u wont have a problem.. get ur certificate, mail it off, chuck ur good system back on and away u go