Callies Ultra connecting rods are produced from extremely clean Timken steel that is formulated to exact specifications. Pride in workmanship, and attention to detail are qualities you’ll discover during careful examination of these finished products. You can be confident of the material and workmanship of these quality components.
Ultra I-Beams are available in our standard weight version for extreme duty racing applications of popular Big Block Chevy, Small Block Chevy, and LS1, as well as liteweight versions for select SBC configurations. For superior clamping, a bolt upgrade to Custom Age 625 material is available for all Callies I-Beams.
Callies latest connecting rod innovation is our unique Ultra XD, designed for extra cam clearance on long stroke applications. The canted fastening system allows the use of a larger base circle cam for increased valvetrain stability, more lift using the same base circle, or longer stroke.
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