I did not say this right, I'll try to be clear this time!

I should have said: My drone is gone after spending a ton of $ with the Dynamat ( Hushmat actually) the drone was still there, but other road noise was diminished.

I solved the problem with a simple fix.

See post # 144 for clarity.
http://forums.corral.net/forums/show...ighlight=drone

Theory explained here -
http://www.phys.unsw.edu.au/jw/Helmholtz.html

 

Well, like I said, it came on the truck, it was a near new system, was welded, and the tips are routed perfectly within 1/8" of exiting the same related to center line and they exit just as I would prefer. Good heavy hangers that can't pull loose. It's free-er flowing than stock, and while it ain't Dynomax, Gibson, Borla ... etc ... once I killed the drone it really sounds pretty nice, not loud, not hick like. Very pleasant, much like a stock GT, maybe a hair louder. Little bit of "burbble" at let off.

Flowmaster wasn't my first choice, nor was Thrush, but adding Thrush really made a nice overall syatem, and with no increase in back pressure as the Thrush core is same size, it does not reduce.

Saved me well over $100 if I had replaced just the muffler at a shop and much more if the whole system.

To each his own ..... but it can be done. Man could use some stainless steel versions if he wanted.