K&N - Engine Management and Airflow Converters - Electronics & Engine Management - '02-'07 WRX & STi

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See details K&N A/F Ratio Monitor / Rectangle Display

The K&N Air/Fuel Monitor is a precision instrument designed to help performance enthusiasts calibrate an optimum air/fuel mixture ratio.

Our price: $185.99

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See details K&N A/F Ratio Monitor / Round Display

K&N A/F Ratio Monitor / Round Display

Our price: $203.99

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