I have a custom turboback with full 3" with no muffler, no resonators, and only a 3" catalytic converter holding it back. Doing a stationary run-up test to 7000(redline) I achieved 114db. At normal idle it was 84db. At 3000RPM it was 98db. Hope this helps your understanding. I had my sound measurements done from the Department of Transportation. They used a Type 1 meter which is the best you can buy.

The pass-by test at 35 mph in 3rd gear gave me 69db(state law is 76db). Although I failled the stationary run-up test I still passed the pass-by test which was all I needed to win the ticket I received. Anyways I really like my exhaust and even though I give you the impression with the stationary tests it is too loud, this is not the case. During cruising it is pleasant, although WOT is when the beast comes out and then it is pretty loud...but what do you expect with a performance exhaust right?

 

Thanks man. Ya I was talking about Buschur. I heard that there are sometimes some fitment problems with Buschur, and that sometimes the slip fit comes apart, so I will just have to put it on tight and see how it does. I bought it from evodave though, and he said there are no fitment issues, so hopefully I won't have to fiddle with it too much. Wasn't planning on the high-flow cat--just the test pipe and magnaflow. Maybe I'll put some money into a cheap decibal meter and drive with it so I don't get these BS tickets I keep hearing about.

 

with the magnaflow your tone shouldn't be much louder than mine