Hey Bull,you sure have got a big mouth, how many times were you asked WHAT SIZE IS THE
HEADER PIPE ?
It's real simple Bud, just be honest then no Crap happens.
You need to get up with the play and understand what the different parts are called.
Let me explain for you.
HEADER PIPE; The piece of tube that comes away from the HEAD, that really should be pretty self explanatory.
Collector; The piece that "COLLECTS" the HEADER pipes together.
TAIL PIPE; The "tail" end of the complete system.
Then we have the Muffler, or Silencer as it is called in different parts of the world.
So now little Bull, you have a full glossary of the components of the exhaust SYSTEM, you can now see what a *****you were making of yourself saying that the header was 2¼".
Two other things, get your act together, I'm in NEW ZEALAND, not Australia.
2nd thing, thanks for the information about the header diameter, that's what I was wanting to know