I need a new exhaust system and would like to use stainless steel. My problem is that I can't find anyone to tell me which brand will give me close to stock loudness level.
I would like to install a 4 in. system,which there are many, and they all ( company reps ), tell me that they're systems are very close to stock.
I guess what I am looking for is someone with personal experince.
Thanks in advance.

The loudness comes down to the muffler.

Go online and find out what the decibel levels are on a stock rig then shop for the muffler that will give you simiular decibels.

With a larger exhaust it will be a bit louder but you should have better fuel milage and power.

Good luck