The fourth-generation 4A-GE engine was generated from 1991 to 1995. It has silver cam covers with chrome lettering, consequently the nickname "silver leading". This engine all over again capabilities a very new cylinder head which uses five valves per cylinder instead of four. It works by using Toyota's Variable Valve https://toyota-4age-blacktop-engi03478.isblog.net/a-review-of-4age-blacktop-for-sale-56861212