Im about to grab a euro r intake manifold . Before I make my order I need to know what size intake manifold bore I will most benefit . As of now I have a stock tb but plan on having it bored in the near future . My simple logic was based on the bigger is better theory however a little research has in a way spoiled it . What will work best now on a stock head (H22A) while leaving room for improvement with future mods cams, p&p ect ?

 

The stock tb makes decent power, I have one on my euro r now..
an s2k or bored/honed stock would be fine i would thtink..

 

what size is your euro r port , and how much did you see in gains ?

 

I made 186/162
I forget the bore of the stock euro r..