Guysowner hasn't given us enough info to conclude its an URI. It could also be asthma, or it could be heartworm. A recent article on heartworm in cats in "catnip" the Tufts vet school newsletter shows that its much more common than people think, causes usually asthma like symptoms in the lungs and can be very dangerous.
It could also be a URI but to even guess we'd have to know:
- what other symptoms there are if any
- how long the cat has had the symptoms
- how old the cat is
- how long he's had the cat
- if the cat was recently in a shelter or outside with other cats
- if the cat goes outside
- if the cat gets a heartworm preventative
- if the cat has a history of these symptoms
And then we'd only be *guessing*. You should schedule a vet visit and not rely on long distance amateur diagnosis, which is the **only** thing you get by asking us for help here, since we are all long distance and we aren't vets.