E30 Zone

Hi Guys Im new to this site ......
im a member on the South African E30 site
as im from S.A
Guys Please i really need help on this, in a few hours im planning on changing my exhaust i want it as origanal as possible cant find the mm anywere been searching hard guys Please HELP
oh! i drive a 1991 325is

I think it is 57mm
if anyone has pics please send

Welcome !

What part of the exhaust diameter are you referring to? the tailpipes i guess...

Your 325is, is this the lightweight 2.7L ??

yip its the 2.7 litre it has the alliminium bonnet fenders as well as door
I would like to know the diameter of the origanal pipes on the car from head to tail .......i think its 57mm but dont know how wide that is