The A3M, A3M1 and A3M2 computers are the service replacement for the A9L computer. i.e, you go to Ford for a replacement for your A9L and you'll get an A3M* computer.

ALL the settings are exactly the same, internally there are slight differences but they are subtle.

The Rev Limit is still 6250 on all of them.
I am selling the A3M1 police issue.