Just ordered new exhaust!

Very, very loud. It's not too bad inside the car - but it's quite loud. The loudest spot is off idle to 3500rpm just driving around down. I had my car out to a dyno day a while ago and my car was easily the loudest out of the 70+ mustangs and a few race cars. The exhaust note is awesome though, can't be beaten...well except maybe regular borlas.
 
Very, very loud. It's not too bad inside the car - but it's quite loud. The loudest spot is off idle to 3500rpm just driving around down. I had my car out to a dyno day a while ago and my car was easily the loudest out of the 70+ mustangs and a few race cars. The exhaust note is awesome though, can't be beaten...well except maybe regular borlas.

That is awesome, i'm soo excited! What midpipe are you running? Also, how much horsepower do you think i'll get from it? I'm hoping 20-30 hp if the gains are what they say they should be, i'm thinking about 12%.