one more exhaust question... i think

[TC4x4]

I got a game plan of what im doing now, pretty sure i am getting a new size inlet muffler by returning the ones I have now, So, what size is the outlet or pipe coming from the stock manifolds on my 78 GMC c35 454?

 

[4xcrazy]

think it's about a 2.5", that's what was on my '86 crewcab that originally had a 454 in it.

 

[TC4x4]

ok, ill double check when i take it in, but i will post up when i get the exhaust done, im going for unique.