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airrick · 04-14-2020, 08:41 PM

To pass smog in CA, you would need both your cats to pass smog. If your aftermarket header does not have a cat (even if it did, its still a coinflip if theyre pass or not)then you gotta install your oem headers then you could pass.

04-14-2020, 08:41 PM	#6
airrick Senior Member Join Date: Jun 2018 Drives: TRD R.S. 1.0 FRS Location: California Posts: 181 Thanks: 87 Thanked 50 Times in 35 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	To pass smog in CA, you would need both your cats to pass smog. If your aftermarket header does not have a cat (even if it did, its still a coinflip if theyre pass or not)then you gotta install your oem headers then you could pass.