Threeway Catalyst Twc System

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To reduce HC, CO and NOx emissions, they are oxidized, reduced and converted to nitrogen (N2), carbon dioxide (C02) and water (H20) by the catalyst.

Exhaust Port

Main TWC

Sub-TWC (CALIF, only)

Exhaust Gas

HC, CO AND NOx

OXIDATION AND REDUCTION

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OXIDATION AND REDUCTION

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h2o n2

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