Rotating the air flow meter allows for the fine tune adjustment needed to achieve optimum air/fuel ratio on a 1.6L Miata. Having your air flow meter professionally adjusted will get it in the "ball park" of where it needs to be for max horsepower, and by rotating the axis of your air flow meter you are able to dial in exactly how lean or rich your fuel mixture will be. At 5X Racing we use an air/fuel ratio meter to get real time air/fuel ratio readings while we are on track, we were not able to get exactly where we needed to be with just a professional afm adjustment. When we were able to rotate the meter, the proper air fuel ratio was easily achieved. This product is a must if you are looking to squeeze every last horsepower out of your 1.6L Mazda Miata engine.
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