Some kitties, just like humans, do snore. I have two cats who snore very loud, when they are completely relaxed. This can be quite normal, but in some instances it could be a sign of an upper respiratory infection, or a mass or foreign body in the upper airways. If your cat has always snored, and if it is not a recent condition and he has no discharge from his nose, I would not worry. I see that Salem is not neutered, which makes him develop a broad head and cheeks. This can also change the anatomy of the airways and cause a tom to snore. If Salem coughs, has a discharge or trouble breathing, I suggest you take him to your veterinarian for an exam.