500+ horsepower potential out-of-the-box using stock valve train geometry. High-flowing 210cc intake ports and .130 raised 75cc exhaust ports. Available with 60cc or 70cc combustion chambers. 70cc combustion chambers are ideal for turbocharged and supercharged applications. CNC gasket-matched port entries/exits with blended valve bowls. Spark plug holes and valves are in the stock location. Valve cover rail raised .150. A relief in the head allows most roller lifters to be changed without removing heads.

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