A rod operated by cams that opens and closes the valves in an internal combustion engine.
- A single big cam is used to pushrod operate two valves per cylinder at the top end, inside aluminium cylinder heads.
- By placing a cam phasing system on the camshaft, a pushrod engine can be tuned to take much higher levels of exhaust gas recirculation.
- By comparison, the Cadillac's 16 overhead valves and pushrods sound trite at best.
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