Edelbrock Performer Series Air / Fuel Ratio Monitor Oxygen Sensor Replacement Helmet Cheek Pad 3-Pump and 6-Pump refers to

3-Pump and 6-Pump refers to the amount of pumps of the handle to lift the tires off the ground of a typical stock car

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Edelbrock Performer Series Air / Fuel Ratio Monitor Oxygen Sensor Replacement Helmet Cheek Pad 3-Pump and 6-Pump refers toThis Air Fuel Monitor displays the actual air fuel mixture in ratios from approximately 12 to 15: 1. Use it to guide carburetor adjustment and jetting or to improve ignition spark advance curves. Not for use with leaded fuels or alcohol. Since 1938, Edelbrock has been committed to making the finest high performance products in the industry. The famous Edelbrock Intake Manifold, Edelbrock Aluminum Cylinder Heads and Edelbrock Water Pumps have become