RB25 stock intake manifold be bore or ported out and polished?

[exodus5547097]

Can a machinist bore and port and polish the stock RB25 intake manifold, so it can flow better? At what price? what you guys think?

[Joe]

im sure it can be done, but there will be little to no benefit.

NA motors benefit way more than boosted ones with that kind of mod.

[Cjmartz2k]

I was thinking about trying to get one extrude/honed if I ever take one of these motors back to the states.

[rb25drag]

Yes it can be done, But to get any benefit you will need to match the port with your head, Also with it being boosted, Your not going to see ALOT of difference. Possibly a Quicker rev, and less lag with a Biger turbo setup.