An odd tidbit about my county. The smog for my 97 is more stringent than for 2000 and up now. I just got a 2001 grand cherokee smogged and it doesn't need the tailpipe sniffer like my 97 requires. All the guy did was a visual inspection and an obd2 interface. I was worried it would need 1700$ worth of cats but apparently they are a non issue. Even here we get small favors sometimes!