Are racing pipe upgrades worth the money? I have heard the stock pipe that comes with the avalanche called a "tuned pipe" but I really doubt it's that great compared to the expensive ones. The SH .28 really screams as is but I heard that putting a real good pipe on it would make a big noticeable difference. Anyone know if this is true? And if it is true I'm up for suggestions on a good brand or model.

Defm~