The 4A-GE engines for the 1985 model yr are known as "blue top rated" instead of the later on "purple prime" engines, as the paint color about the valve handles is different, to indicate the different engine revision, applying different port sizes, different airflow metering, together with other slight differences around the engine.As pointed out h

Oil cooler is mandatory, and for all programs a bigger radiator is a superb investment decision. Use the 4AGZ injectors and fuel tension regulator for turbo conversions in the Commonly aspirated 4AG. 550cc injectors are available for critical Enhance / engine outputs. The gasoline pump can be replaced Together with the Supra Turbo pump, a direct bo