Intake Manifold Codes

Intake Manifolds have casting codes on them as well and with the date code you can determine what engine it came on.  They are located on usually on the number 1 intake runner by the thermostat.

The date code is a 3 or 4 digit code. The first digit will be a letter.

C=March, etc.

Followed by a 1 or 2 digit number for the day of the month. The last digit will be the year.