What is port matched? in terms of TB
 

So i had asked a question earlier about TB compatibility and someone responded with

"all honda TBs fit all models they just have to be port matched"

what does that mean?

Bored out to be the same size diameter as the intake manifold. Where it bolts up to.

when you connect the TB to the IM, the IM has a smaller diameter thus "porting" it means making the diameter bigger. port match means making the diameter in the IM as big as the tb.