Exhaust muffler db ratings?

[thunderracing91]

I was just wondering if I could find some db ratings on the aftermarket mufflers? I have the intentions of getting a header and mid pipe but I would really like to keep the muffler db close to stock as possible but yet have a little better performance. Is the stock muffler really restrictive?

Thanks
Andrew

[marcus]

get an i phone and load a decibel meter on it comes in handy.. under 93db i think is legal.