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Seen here during construction of the upper intake tract, the Four-Valve modular is basically a Sean Hyland standard supercharged assembly. SHM moved the compression down from the normal 10:1 to 9:1 in deference to the long, open-road races; otherwise, the engine uses SHM’s Stage II cams and ported heads, forged pistons, and other goodies. Engine management is by Motec. View Related Article
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