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An intake valve typically opens between 0.3 to 0.6 inches (7.6 to 15.2 mm) in most internal combustion engines, though this can vary based on engine design, performance specifications, and tuning. The exact lift is influenced by factors such as camshaft design and engine RPM. In high-performance engines, intake valves may open even further to optimize airflow and boost power.

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4d ago

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