Exhaust collectors compatibility

Hi all

Are the 170, 198 and 225 exhaust collectors the same and interchangeable?

I would like to replace mine, but here, 170ci engine used parts are more common than those for 198 or 225ci. I also know that there are some minor differences between the 170ci and the bigger slant six.
So, would a 170ci exhaust collector fit my 198ci?

:thankyou:
François