The fourth-era 4A-GE engine was developed from 1991 to 1995. It's silver cam covers with chrome lettering, hence the nickname "silver leading". This engine yet again options a completely new cylinder head which works by using five valves for each cylinder as an alternative to four. It uses Toyota's Variable https://mariofkvbk.glifeblog.com/38454448/toyota-4age-things-to-know-before-you-buy