I have a stock system with the muffler delete. I had a shop build my tail pipes. We tried different size tips to get the sound I was looking for. I ended up with 4" x 18" slant cut tips and the sound is good. Stock size tips sounded like crap. Also, tips with rolled ends did not produce a good sound.
I live in a Air Force RV park, most are 62+ which is 5 years or more older than us and no one has complained. Most of the neighbors comment that they love to hear the sounds my two Mustangs put out.