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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.

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Old 08-24-2016, 11:21 AM   #1
haavardnk
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Catless UEL CO emission level?

Im planning on getting a catless UEL header for my 86, and I was discussing the emission levels with a toyota mechanic after the car was in for periodic control. The emission level on CO was measured at 0,1% and the limit for approval is 0,3%. I'm wondering how much difference removing the header cat will make?

Does anyone have a CO measurement of their car with a catless header?
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Old 08-24-2016, 01:20 PM   #2
rns294
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I don't know 100% but based on the smell from my car, I would bet a considerable amount of money that a catless uel would fail a sniffer test.
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