I've seen a lot of people buy an expensive cat to pass smog, then fail again 2 years later.
The underlying condition is high NOx. A cat will scrub close to legal limits for a while, but it will burn it up in time.


91 YJ
2 Seater Sand Rail
Handfull of other fun toys...
And a brand new, spit shined, B.S.
Oh, and a job to boot.