The fourth-technology 4A-GE engine was generated from 1991 to 1995. It's silver cam covers with chrome lettering, hence the nickname "silver top". This engine over again capabilities a very new cylinder head which takes advantage of 5 valves per cylinder rather than 4. It takes advantage of Toyota's Variable Valve https://toyota-4age-blacktop-engi79112.blogerus.com/61569298/details-fiction-and-blacktop-4age