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Callies-Small Block Chevy Ultra I-Beam Connecting Rods

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Availability: In stock


Quick Overview

Ultra Connecting Rods

  • Increased Stroker Clearance – The best bolt to block & rod to cam clearance in the industry for long stoke applications.

  • Bolt Spotface Gussets – Allow optimized bolt location without loss of strength or defomation of the big end bore.

  • 100% Thread Engagement – Assures no bolt threads are left exposed in the area between the bolt thread and  shank.

  • Specifically Designed, 260Ksi Ultra Bolts – All Ultra bolts are designed to fit each specific rod. Rolled threads are employed to provide improved engagement for a more consistent clamping load.

Callies-Small Block Chevy Ultra I-Beam Connecting Rods

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Callies Ultra connecting rods are produced from extremely clean Timken steel that is formulated to our exact specifications.  This proprietary steel is forged in Trenton, Michigan, and manufactured 100% in our Fostoria, Ohio facility.   Pride in workmanship, and attention to detail are qualities you’ll discover during careful examination of our finished product. Each step of the manufacturing history of every Ultra rod is meticulously maintained by our manufacturing team.  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.


Part #


Rod Jrnl

Weight (g)

U14125 5.700 2.100  
U14132 5.850 Honda 581
U14131 5.850 2.000 629
U14130 5.850 2.100 648
U14137 6.000 Honda 586
U14136 6.000 2.000 636
U14135 6.000 2.100 655
U14141 6.125 2.000 638
U14140 6.125 2.100 660
U14145 6.200 2.100 667
U14151 6.250 2.000 641
U14150 6.250 2.100 668
U14139 6.000 2.000 600
U14138 6.000 2.100 610
U14144 6.125 2.000 602