P0420 code options - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Blueapples · 06-16-2023, 12:32 PM

Looking to fix the CEL p0420 code on my 2013 brz. I have diagnosed the issue and found that the cat is well on its way out.
I am looking at potential options. Would I be able to resolve this issue by switching to an after market UEL catted header and tune? the OEM cat would cost me roughly same amount but offer no performance gain over what I am currently running (stock everything).

RToyo86 · 06-16-2023, 02:22 PM

Buy a used OEM header, or go with an aftermarket with a tune if you want a little bump in power.

Blueapples · 06-16-2023, 06:04 PM

I'm seeing the only available catted header are from JDL, I might buy that. Anyone know what tune is best with this header?

blsfrs · 06-16-2023, 10:28 PM

I remember somewhere reading there marginal gains with a 2nd gen header.

Luns · 06-17-2023, 05:03 AM

Quote:

Originally Posted by blsfrs

I remember somewhere reading there marginal gains with a 2nd gen header.

It's unclear how things compare without a tune, but with a tune there does seem to be a nice gain.

06-16-2023, 12:32 PM	#1
Blueapples Junior Member Join Date: Apr 2016 Drives: Brz Location: San diego Posts: 7 Thanks: 0 Thanked 1 Time in 1 Post Mentioned: 0 Post(s)	P0420 code options Looking to fix the CEL p0420 code on my 2013 brz. I have diagnosed the issue and found that the cat is well on its way out. I am looking at potential options. Would I be able to resolve this issue by switching to an after market UEL catted header and tune? the OEM cat would cost me roughly same amount but offer no performance gain over what I am currently running (stock everything).

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06-16-2023, 02:22 PM	#2
RToyo86 Senior Member Join Date: Mar 2018 Drives: 17 Asphalt 86 Location: Ottawa Posts: 2,421 Thanks: 1,907 Thanked 2,676 Times in 1,307 Posts Mentioned: 16 Post(s)	Buy a used OEM header, or go with an aftermarket with a tune if you want a little bump in power.

06-16-2023, 06:04 PM	#3
Blueapples Junior Member Join Date: Apr 2016 Drives: Brz Location: San diego Posts: 7 Thanks: 0 Thanked 1 Time in 1 Post Mentioned: 0 Post(s)	I'm seeing the only available catted header are from JDL, I might buy that. Anyone know what tune is best with this header?

06-16-2023, 10:28 PM	#4
blsfrs Senior Member Join Date: Dec 2018 Drives: 2013 frs base Location: central Virginia Posts: 1,469 Thanks: 2,801 Thanked 1,486 Times in 702 Posts Mentioned: 13 Post(s)	I remember somewhere reading there marginal gains with a 2nd gen header.

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