Shakerhood said:Well its been fun going back and forth about all of the Theories why people imagine their Flows are getting louder, but today we can end it with FACT. I called Flowmasters Tech Department, remember these are the people that design, manufacture and test these exhaust systems. I was told the sound of a Flowmaster WILL NOT change in sound over its life. Every Theory that was posted on here was completely debunked by the Tech Department!
Let's clarify something.
Flowmasters technical department, and the people who manufacture and test their systems are 2 very different sets of people. The people who do the testing are not the ones you talk to on the phone. The ones you spoke to are sitting in front of a computer in a room full of cubicles, who type keywords from your problem, i.e. "loud" "bad fit", etc, then read you the answer that comes up.
The ones who test the stuff (if they were reachable by phone,) I'm sure would (off the record,) admit that there is a sound change with nearly all mufflers, for whatever reason.