I think about to go down pipe. Should i go with the catless or with cat? I am worry about getting pull over and the cops will pop the hoood and don;t see any cat on the down pipe. Wil teh catless pass smog

 

i LIVE IN CA

 

CA????

Do the words, "When Hell freezes over" mean anything to you?

There are three ways to go with exhaust after the turbo.

Fully catless - loss of power lower down, more power for turbo. I don't recommend this unless you are planning on getting a different turbo than stock.

Leave downpipe cat in - this removes any need to worry about cels and you might be able to pass a sniffer test with this set up. But the visual test is going to get you.

Leave third/midpipe cat in. Smaller cat that doesn't hinder turbo, but you won't pass sniffer with it. You'd have to put your stock downpipe back in to get smogged. Also, this will cause you to throw a cel without a fix.

CA is the most strict state regarding smog testing. You are supposed to fail if you can't pass inspection, regardless if you can pass the sniffer itself

 

In california new vehicles don't have to be smogged for four years so in the meantime run whatever you want, that is if you bought new. When the cops are around just don't give it that much throttle so you don't stick out like a sore thumb.