Best way to run catted section 1 for CA smog ?

[jpy1980]

How are you guys getting by with no visual check? Do you think I can pass with oem headers but with a csl intake and custom tune? I’m in LA fwiw

[jpy1980]

Also another question is why are you guys running careless headers only to add a catted section 1? Does the exhaust sound different since the cats are downstream? Or does it flow better that way?

[amiao]

How are you guys getting by with no visual check? Do you think I can pass with oem headers but with a csl intake and custom tune? I’m in LA fwiw

I also live in LA. Visual will pass only without any aftermarket parts and tunes on the car. You will have to revert back to factory tune and box in order to pass.

My CSL headers and OEM box pass visuals no problem as you cannot tell its aftermarket. Catted section 1 can’t be seen on visual inspection.

I have a Karbonious box I plan on installing myself to understand how to install and revert back to factory due to this exact issue. But waiting to pass my next smog inspection so I can enjoy it for 2 years without having to do what I mentioned above.

[amiao]

Also another question is why are you guys running careless headers only to add a catted section 1? Does the exhaust sound different since the cats are downstream? Or does it flow better that way?

If you run catless headers you won’t pass smog in CA. In order to pass smog and continue to run catless headers run a catted hi-flow section 1. Still get the performance gains of the catless headers, and still pass smog. The catted section 1 will likely reduce power a very slight amount, but that’s part of the price to pass emissions.