The 4A-GE engines for the 1985 product yr are known as "blue top" versus the later "purple prime" engines, as the paint colour about the valve addresses is different, to indicate the different engine revision, using different port sizes, distinct airflow metering, as well as othe

Adjustable cam pulleys will assure accurate timing and cylinder tension tuning. Forged superior compression pistons are inexpensive and so are a superb upgrade. Modifying to your late model head will require fabrication of a new intake layout for RWD. The throttle human body will also be enlarged to