The Jeep Tornado engine was the first post-World War II U.S.-designed mass-produced overhead cam (OHC) automobile engine. The 230.5 cu in (3.78 L) straight-six was introduced in mid-year 1962, and replaced the flathead 6-226 Willys Super Hurricane that was in use since 1954. The Tornado engine was also manufactured in Argentina by Industrias Kaiser Argentina (IKA) from 1965 to 1973.