I figure a bigger pipe is about the only difference.
I know lookin at mine (stock), and the wifes (TOR's),
the only external difference is the diameter of the hole coming out.
So, I figured if I drilled 4 quarter inch holes on the outside,
I'd achieve the same rumble.
I didn't.
Now I know I need to go in "deeper".
Thats always been my problem,
couldn't get deep enough.. :shock: