Honestly I couldn’t tell you as I rarely pour them. If I like the air speed I see and flow numbers that’s all I need. These are only 2.02 valves and planned cam is .510 or under. I did pour my best set of 2.08 heads I’ve ever done and They were 194 cc intake runner and flowed 318 cfm. I have a post on a set I moved the pushrod over on but they aren’t done yet. I will be pouring rubber molds on them when they are done and I will be starting the 2021 race season with that engine. I have the shortblock already built.