Gutting primary cat? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

jordanrw260 · 03-06-2013, 09:47 AM

Has anyone gutted the primary cat in the stock exhaust manifold (header)? I remember doing this on my old 92 Dodge Stealth R/T Twin Turbo, but didn't know if this was a bad idea on such a new vehicle.

The Slow One · 03-06-2013, 09:50 AM

you only gain 1-2 hp from gutting the cat. Its not worth the hassle.

jordanrw260 · 03-06-2013, 09:59 AM

thanks

BOND007_LTK · 07-29-2018, 06:40 AM

Not entirely accurate. Contradicted by looking at other posts especially gutted when tuned (even if it's OFT).

Lantanafrs2 · 07-29-2018, 10:10 PM

Buy a used header and store stock header. Less hassle, more gains.

kch · 07-30-2018, 07:48 PM

Quote:

Originally Posted by BOND007_LTK

Not entirely accurate. Contradicted by looking at other posts especially gutted when tuned (even if it's OFT).

colossal thread necro, mate

Lantanafrs2 · 07-30-2018, 10:24 PM

Fwiw perrin did a blog on this. Before and after untuned results. Untuned with cat vs tuned no cat is not a valid comparison. The tune obscures things

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07-29-2018, 06:40 AM	#4
BOND007_LTK Member Join Date: Aug 2017 Drives: 2013 brz Location: toronto Posts: 68 Thanks: 0 Thanked 7 Times in 5 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Not entirely accurate. Contradicted by looking at other posts especially gutted when tuned (even if it's OFT).

07-29-2018, 10:10 PM	#5
Lantanafrs2 Senior Member Join Date: Jan 2018 Drives: 2013 frs red Location: South Florida Posts: 3,517 Thanks: 2,520 Thanked 3,088 Times in 1,654 Posts Mentioned: 6 Post(s) Tagged: 1 Thread(s)	Buy a used header and store stock header. Less hassle, more gains.

07-30-2018, 10:24 PM	#7
Lantanafrs2 Senior Member Join Date: Jan 2018 Drives: 2013 frs red Location: South Florida Posts: 3,517 Thanks: 2,520 Thanked 3,088 Times in 1,654 Posts Mentioned: 6 Post(s) Tagged: 1 Thread(s)	Fwiw perrin did a blog on this. Before and after untuned results. Untuned with cat vs tuned no cat is not a valid comparison. The tune obscures things

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