Introduced as a DOHC VTEC system in the 1989 Honda Integra and Civic CRX XSi models sold in Japan and Europe, which used a 160 bhp (120 kW) variant of the B16A engine. The US market saw the first VTEC system with the introduction of the 1991 Acura NSX, which used a 3 liter DOHC VTEC V6 with 280 bhp (210 kW).
DOHC VTEC engines soon appeared in other vehicles, such as the 1992 Acura Integra GS-R (B18C1 1.8 liter engine). And later in the 1992 Honda Prelude VTEC (H22A 2.2 liter engine with 195 hp) and Honda Del Sol VTEC (B16A 1.6 liter engine). The Integra Type R (1997-2001) available in the Japanese market produces 200 bhp using a B18C 1.8 engine. Honda has also continued to develop other varieties and today offers several varieties of VTEC, such as i-VTEC and i-VTEC Hybrid.