I received my Cat today. Not sure what numbers are required by C.A.R.B., but it looks just like the cat that is on my Jeep now, just doesn't have numbers and was about $300.00 for the entire exhaust system. As long as it passes SMOG, I'll be a happy camper. It's sad that California is ran by bunch of liberal dictators. They cost people a lot of money that's just a waste. Where does that money go? I'm sure Gavin Newsom is putting some of that back in his bank account. I didn't vote for him or anything C.A.R.B. Requires. As a Californian I feel like I live in China and goes against everything I served in the Military for.