I don't even think Mazda has the stock decibel levels for the FB anymore. Not that it matters, since all FBs are now exempt from this poorly thought-out law.

 

A non-issue for me x2 then.
1. mines an 84
2. I cut out the 3" to Magnaflow and installed my RB duals and WOW! smoothe and sounds good too. Hell, I am irritated at the sound of my fuel pump now and I couldn't even hear it before. LOL