For a first mod I would recommend an intake.

Note: in California, you'd better keep the old one on hand in order to pass smog inspections. This may apply in some other states too, for all I know.

96 GL Zetec ATX, white with pinstripe, nickname " Sam Smooth "
mods so far: CTA intake with homemade heat shield, KVR drilled front rotors & carbon pads w/ 500° fluid
planned mods: exhaust (want to keep it quiet), e-ram (awaiting installation), diablo chip
involuntary mods: compression increased after head gasket failure