Four Valves Per Cylinder, Glossary and Terms, Automotive, Motorcycle, Boat Dealers

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"Four Valves Per Cylinder"

A valvetrain with a total of four valves in the combustion chamber, typically two intakes and two exhausts. Compared to the more common two-valve-per-cylinder designs, a four-valve layout offers improved breathing and allows the spark plug to be located closer to center of the combustion chamber.

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