Click on any thumbnail picture to enlarge (640x480) OR click on the picture name for a full-size (1800x1200) image

Flow numbers for a Race-Ready set of AFR210s directly from AFR, from TEA with a pipe on the exhaust: (AFR usually publishes flow#s without a pipe)

Lift... Intake / Exhaust
100.. 67.3 / 47.1
200.. 131.4 / 107.1
300.. 189.6 / 162.3
400.. 237.0 / 214.1
500.. 269.8 / 248.0
550.. 278.3 / 256.3
600.. 280.9 / 262.6
700.. 282.9 / 274.4

Flow numbers from Chevy High Performance Magazine Head flow database, with/without a pipe on the exhaust:

Lift... Intake / Exhaust / Exh w/pipe
.200 140 / 115 / 118
.300 197 / 148 / 153
.400 240 / 180 / 183
.500 271 / 198 / 200
.600 279 / 210 / 210
.700 284 / 218 / 218

Flow numbers from these heads, before and after a hand cleanup of both intakes and exhaust ports. (without a pipe on the exhaust)
After porting, numbers closely approximate the Competition CNC porting flow numbers from AFR:

Lift...       Intake / After-Intake       Exhaust / After-Exhaust       E/I ratio
.100               73 / 79 (+4)                         59 / 64 (+6)             .81
.200             130 / 138 (+8)                     110 / 117 (+7)           .85
.300             180 / 190 (+10)                   146 / 152 (+6)           .80
.400             233 / 241 (+8)                     177 / 189 (+12)       .78
.500             274 / 278 (+4)                     203 / 212 (+9)           .76
.600             285 / 288 (+3)                     220 / 228 (+8)           .79
.650             283 / 289 (+6)                     224 / 232 (+8)           .80
.700             285 / 292 (+7)                     227 / 236 (+9)           .81

AFR Spec sheet

Pictures from Original Owner

afr_bottom