I think he is talking about the guy that put a blast gate in his muffler and took the insulation out.
You could change out the air filter to an aftermarket one and that will make it breath a little better. I don't know how many miles you have but mine seems a bit louder lately. I am at 8500 and it just warmed up here in New England. It is nice to be able to have the window down and hear the engine rev when I hit the gas.
I am seriously itching to put a Vanguard Ti on very soon.