99bluefirebird

iTrader: (7)

What is the stock exhaust size for a 2003 gmc sierra denali 6.0? I would like to put a cutout between the crossover pipe/Y and the muffler. I would just measure but the truck is 800 miles away, I would like it to go ahead and order it. I assume its somewhere between 2.75 and 3.5" into the muffler?
Thanks

AndysC3

iTrader: (14)

its duel 2.75 pipe to the muffler and y's after the muffler.

99bluefirebird

iTrader: (7)

That sucks. So I need 2 2.75" cutouts unless I want one after the muffler (probably would not be very loud?)
What size is the single pipe out of the muffler? 3" I am guessing?

06murder

2.4 from each manifold n 2.75 stright back

99bluefirebird

iTrader: (7)

Is there enough to run 2X 2.5" cutouts while its small or would I be better off ordering 2X 2.75" and putting them where the pipe goes to the muffler?