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Ships within 48 hours · Estimated delivery Sep 14 - Sep 19
comfortable to drive in and stylish with a bit of aggression in it s curves
NOTE: Injectors are only sold in sets of 6 and ECU tuning is required
aggressive exhaust note without excessive drone
Part #: 571101
Make sure the area is clean and free from any product similar to Armor All
Subaru OEM Rear Oxygen Sensor Subaru STi 2008-2021 | 22690AA850 CM comfortable to drive in andFor 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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