K&N Fuel/Air Ratio Monitor
The K & N Air/Fuel Monitor makes it easy to accurately tune the mixture in your engine for maximum power and efficiency. Single-wire oxygen sensor works with carburetors or fuel injection.
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The K&N Air/Fuel Monitor helps with jetting or injector settings on any engine running on unleaded gasoline, alcohol, propane or nitrous oxide. Mounts in a 2" hole like any standard gauge.