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Callies Ultra H-Beam Connecting Rods


Ultra connecting rods are made entirely in the U.S.A. Every Ultra connecting rod is produced from specially formulated Timken 4330M steel.

$1,329.99

This material is then precision forged in Michigan and fully machined in our Fostoria, Ohio facility. Many geometric nuances have been incorporated into the design of Ultra connecting rods. These design features enhance the Ultra against specific loads and stresses which are applied to connecting rods
subjected to high load, high RPM applications. Ultra connecting rods are fastened by high alloy cap screws made specifically for severe duty service by ARP Inc. Produced with rolled threads, these unique bolts offer improved
thread engagement for a smoother more consistent net clamping load. To eliminate deformation and extrusion only AMS 642 bronze alloy is used within the wrist pin housing bore.
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.

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Weight 16.26 lbs
Dimensions 4.15 × 9.6 × 10.8 in

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