HONDA PRODUCTS

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Introduced as a DOHC (Dual overhead camshaft) system the United States market saw the first VTEC system with the introduction of the 1991 Acura NSX which used a 3-litre DOHC C30A V6 with 270 bhp (200 kW).

Honda also applied the system to SOHC (single overhead camshaft) engines such as the D-Series and J-Series Engines, which share a common camshaft for both intake and exhaust valves.