This is not mine. I saved this from a Moparts post from 2009.

FHO CNC Ported Stage V Replacement Heads. For mild to wild street strip engines.

FHO CNC Replacement Head- Notes- application Blown Pro-Street Hemi - Use 45 degree wide seats for durability.
Note - Use stock intake and exhaust port openings.

Exhaust Port with 1.90" Valve Intake Port with 2.30" Valve
Flowed at 28" without tube. Flowed at 28"
.100" 61 .100" 75
.200" 135 .200" 159
.300" 187 .300" 248
.400" 230 .400" 315
.500" 258 .500" 384
.550" 267 .550" 412
.600" 279 .600" 435
.650" 287 .650" 453
.700" 295 .700" 467
.750" 298 .750" 469
.800" 301 .800" 471

Stage V Replacement Head with FHO CNC Porting.

Tests performed on Superflow 600 with FlowCom.
4.500" Bore Plate
Combustion Chamber 168cc
Intake Volume 241cc
Exhaust Volume 118cc
Intake Valve 2.30" Ferrea Titanium Tulip 11/32" Stem
Exhaust Valve 1.90 Ferrea Inconel TF Stainless Tulip 11/32" Stem