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Ships within 48 hours · Estimated delivery Sep 13 - Sep 18
7% stiffer than OEM
designed around their famous Whiteline Plus series polyurethane bushings
aggressive exhaust note without excessive drone
Part #: SUB-11044AA633
Subaru OEM Rear Oxygen Sensor Subaru STi 2008-2021 | 22690AA850 CM 7% stiffer than OEMFor your: Subaru STi 2008 2021 Rear O2 Sensor The rear oxygen sensor is used to sense oxygen concentration in the exhaust gas. If the air fuel ratio is leaner than the stoichiometric ratio in the mixture (i. e., excessive amount of air), the exhaust gas contains more oxygen. To the contrary, if the fuel ratio is richer than the stoichiometric ratio, the exhaust gas contains almost no oxygen. Detecting the oxygen concentration in exhaust gas using the
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