Small Block Head Flow Chart

Interesting observation on W5 heads.
I had the first set Ryan ever did. Supposedly Brett did a single intake and exhaust, and Ryan “ copied” them.
On his site he claimed 330 ish cfm max.
Best Machine flowed them, along with another well known Mopar head guru i have a ton of respect for.
Those heads barely reached 300 on both their benches.
That said, those heads went on to run right at 140 mph in a 3220 pound race weight A body, until they ultimately turned into sprinklers. That on 002/003 leafs. So not some trick chassis car
You can do the math, thats a pretty solid 700 ish horsepower.
Convinced me flow benches aren't everything. But good for comparisons.
I was astonished by the relatively “ low” flow numbers but the numbers they put up at the track.
Once those heads “ went away” they were swapped for Modern cnc W5 heads, no other changes
ET looked 25 ish horse less with the CNC units over hand ported ones