The fourth-generation 4A-GE engine was produced from 1991 to 1995. It's got silver cam handles with chrome lettering, hence the nickname "silver best". This engine over again options a totally new cylinder head which employs five valves for each cylinder rather than 4. It employs Toyota's Variable Valve Timing (VVT) https://jaidenbxpkb.gynoblog.com/38606525/blacktop-20v-4age-an-overview