The fourth-technology 4A-GE engine was developed from 1991 to 1995. It has silver cam covers with chrome lettering, that's why the nickname "silver top". This engine once more characteristics a completely new cylinder head which takes advantage of five valves for each cylinder rather than 4. It uses Toyota's Variable https://toyota-4a-ge37147.aboutyoublog.com/49548965/detailed-notes-on-toyota-4age-blacktop-engine-for-sale