do these dmaxs employ a catalytic converter?? just fmi..tks, later bc

The california models have both a cat and an EGR, the others dont, unless it's an 04 -Tony

Some up in the Northeast have the heavy emission package also ,particularly in Mass ....

There are only two kinds for 03, ones with the CA emissions package(Cat and EGR) and ones without. If your state requirements are higher than federal, you automatically get the CA package.