PRC 247cc CNC Ported Cylinder Heads

PRC 247cc CNC Ported Cylinder Heads

Precision Race Components all new cylinder head castings completed with 247cc runners. For 408 cubic inch and larger applications with 4.03″+ bore sizing.

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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!!

The all new 247cc cylinder head is finally available for customers looking for the pinnacle of LS cathedral port performance. The new 247cc port has been flow bench tested to flow over 360cfm.

Flow Data:

No Exhaust Pipe

• .100″ Lift: Intake Flow 66 CFM / Exhaust Flow 57 CFM
• .200″ Lift: Intake Flow 147 CFM / Exhaust Flow 117 CFM
• .300″ Lift: Intake Flow 228 CFM / Exhaust Flow 170 CFM
• .400″ Lift: Intake Flow 282 CFM / Exhaust Flow 206 CFM
• .500″ Lift: Intake Flow 321 CFM / Exhaust Flow 227 CFM
• .600″ Lift: Intake Flow 343 CFM / Exhaust Flow 235 CFM
• .650″ Lift: Intake Flow 355 CFM / Exhaust Flow 241 CFM
• .700″ Lift: Intake Flow 360 CFM / Exhaust Flow 245 CFM