stg 1 if you are lucky, it is basiaclly the same as any other efi escort and is nealry maxxed out as std on the escos, a good std one will handle stg1, but if its an old 1, it may not even cope with that.

the motorsport shels had a removable panel ni the boot to access the pump to fit a uprated one easilly, the lux and std ones i'm afraid you have to drop the tank and remove the rear bumper to access it