1.1 exhaust ID and OD

[Jinx]

Hi,


I own a 73 kadett and i'm looking around to fit a GT 1.1 exhaust on there. I would expect a slightly larger diameter but not much. I have a reproduction kadett 1.1/1.2 downpipe and first muffler and would like to fit the GT elbow over the axle and last muffler. So i need the ID/OD for the 1.1GT stuff so i know wether i need to make an adapter or not.

and for a second question: i think the total length of the last muffler is a bit shorter on a GT than a kadett. How much extension would be needed before or after the muffler-can to fit my kadett?


thanks in advance!


Jinx


PS.: sorry for my lousy technical english