I got the numbers from the afr website not from here.
I wonder if the website is wrong then, because 277 CFM @ .600" lift is about what I've seen before for the 185s. I'm looking at their website right now and it looks like they might have accidentally posted the 195 flow numbers on the 185 page. This is what I see on their website below:
Flow numbers for the 195:
Flow numbers for the 185:
Obviously they wouldn't be the same.