I need to know what the port exits measure on these. I know it is supposed to match a 1205. My heads (AFR 180's) are supposed to closely match a 1204. I don't want my intake port exits bigger than my head port entries and really don't want to take a grinder to my cnc'd heads. Any info is greatly appreciated.

 

They match a 1205. Look up the 1205 deminsions on Summit or jegs.

 

The gaskets that AFR recommends with their heads which is the 1205 I believe is a little bit bigger than the ports. If you are switching to the HSR, its a perfect match to the 180cc.