CNC ported GM 317 Castings, 228cc intake runner, 84cc exhaust, 72cc chambers (sold as a pair)
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CNC ported GM 317 Castings, 228cc intake runner, 84cc exhaust, 72cc chambers
| Lift | Intake Flow (cfm) | Exhaust Flow (cfm) |
| .200" | 148 | 115 |
| .300" | 208 | 153 |
| .400" | 256 | 193 |
| .500" | 293 | 205 |
| .600" | 314 | 221 |
| .650" | 317 | 225 |
