Edelbrock 1489 Performance Series Carburetor Calibration Kit<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Includes an assortment of metering rods and jets</li><li>Includes one pair of metering rod retaining springs</li><li>Comes with complete assortment of step-up springs</li><li>Components and quantities are specifically tailored for each carburetor</li><li>It offers more volume with optional single or dual inlet for total fuel plumbing flexibility</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41vSSuYGOmL.jpg" noproxy>