Small block TrickFlow heads part 1
Exhaust flow numbers
————stock————ported
.100—-43—————-43
.200—105—————106
.300—154—————158
.400—181—————193
.500—191—————207
.600—195—————213
.700—198—————217
Port airspeed is quiet, calm, and much faster. .500 lift speed went from 255fps to 330fps.