Speedmaster heads part 2. Plus intake work

THose stock numbers are just what speedmaster sent to me

hello we only have the flow numbers for the as cast head:

Intake

Exhaust

Valve Opening CFM
Valve Opening CFM

0.050 29
0.050 25.2

0.100 62
0.100 49

0.200 125
0.200 103

0.300 178
0.300 139

0.400 221
0.400 157

0.500 236
0.500