![Import Service Article Image Import Service Article Image](https://www.performancetechnician.com/pdf/1989/05/198905IS_HondaCVCC.jpg)
Honda first introduced its Compound Vortex Controlled Combustion, or CVCC design in 1975. It was a pretty revolutionary concept for its time. Back in the Dark Ages of auto emissions, most stumbling attempts at emission control were add-ons that caused many driveability problems, and actually reduced fuel economy.
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