Skip to product information
Precision Race Components all new cylinder head castings completed with 247cc runners. For 408 cubic inch and larger applications with 4.03"+ bore sizing.
MADE IN THE USA!!
CAST IN THE USA!!
MACHINED IN THE USA!!
Features:
- 247cc Fully CNC Ported Intake Runners
- 84cc Fully CNC Ported Exhaust Runners
- TSP .660 Spring Kit w/ PAC Valve Springs & Titanium Retainers
- 68cc CNC Machined Chambers
- CHE Bronze Guides
- 2.120" Hollow Stem Intake Valves/ 1.600" Stainless Exhaust Valves
- Factory Rocker Friendly!!*
Flow Data:
No Exhaust Pipe
LIFT | INTAKE FLOW | EXHAUST FLOW |
.100" | 66 CFM | 57 CFM |
.200" | 147 CFM | 117 CFM |
.300" | 228 CFM | 170 CFM |
.400" | 282 CFM | 206 CFM |
.500" | 321 CFM | 227 CFM |
.600" | 343 CFM | 235 CFM |
.650" | 355 CFM | 241 CFM |
.700" | 360 CFM | 245 CFM |