My Intake manifold opening is 66mm and my Throttle body is 68mm can this presents problems or do you guys think ill be alright. I do have upgrades that will definitely use the extra air but i want to know if its better to have your throttle body a lil bigger or your intake manifold?

 

i believe that the general consensus on TB size, is that the opening must be portmatched or else it will hinder flow. Whether or not its better to run a stock sized TB rather than an Oversized without the matching is better, remains to be seen.