Texas Speed & Performance 199-SSPRC247CNC - 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. 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.