What is the diameter of those ports?

I started the upper intake last night and lower gaskets and now have the lower intake freed and beginning the cleaning process. I need to clean the injector ports with a snug-sized brush, but forgot to get the diameter before I called it a night last night! I was hoping to buy the brush on lunch today...just need to know the size!

3/8 npt thread is close. sorry I dont have the exact size

Thank you....I was thinking 5/8 for some reason, but 3/8 sounds about right.

The ports aren't threaded. I assume this is just a size reference?

Yes it was. I just needed to know what size brushes to buy. :?

Have you ever seen the little batter brushes for cleaning the terminals? That'* about the right size. Those brushes are usually a tapered cone shape.

I bought a 5/8" tappered cone shape brush and used it in my drill and went at it (gently so I didn't remove any aluminum) and it worked great!

I got everything back together. Tonight will be the moment of truth when I refill the DeathCool and get that damned serpentine belt changed (what a poor design to have to remove the engine mount to get the belt off.......UGH!!!!!).