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Air Fuel Ratio (AFR) Gauges are devices that measure and display the ratio of air to fuel in a combustion engine. These gauges provide real-time feedback on the engine's efficiency, allowing drivers to optimize fuel consumption and performance. By monitoring the AFR, users can adjust their driving habits or engine settings to achieve the ideal fuel mixture for improved mileage and power. These gauges are essential for tuning engines, diagnosing issues, and preventing engine damage due to lean or rich fuel mixtures. Investing in Air Fuel Ratio (AFR) Gauges can lead to cost savings and better engine performance in the long run.