I went to clean up my cylinder head on my 01 GSR. When I looked at my exhaust ports I noticed this on cylinder 4 (closest to the tranny and vtec selenoid). I am assuming this is a defect, but since it is in the exhaust port and not the intake do you think it would pose an issue after I rebuild the engine since it will alter the volumetric efficiency for that cylinder?

 

I cant see the pics but I already know what you're talking about. Its not a defect. Honda originally cast the head with the idea that having an EGR valve may be necessary for emissions. It wasn't needed so they continued using the same casting molds.

 

The link should be working now. I hope this is what you were referring to.

 

See it now, that's what it is. Thats the way they all are.