Induction kit/intake size help?

[V1NNY]

Hi i was wondering if anyone knows how big there intake is? hope this makes sense, i'm after a new enclosed induction kit but there arent many around for my car so i was going to buy one intended for a 172 or something like that but need to know how big the intake is, i think mine is 76mm or something like that

If you know or can help please post details of what engine you have and how big your intake is. thanks

 

[len_beach]

My car is a mk2 172.
The external bore of the intake is 73mm with the external bore of the airbox being 70mm.
Hope this helps mate.