Edelbrock 1449 Metering Rod - Set of 2<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Designed for use with the Edelbrock Performer and Thunder Series carburetors only</li><li>Rods are incredibly easy to change</li><li>Metering rod is used to control the air/fuel mixture</li><li>Diameter of the cruise and the power is 0.070 and 0.037</li><li>Allows you to fine-tune your carburetor for optimum performance</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31HSo8jZOmL.jpg" noproxy>