Ultra XD I-Beam

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.  

• Increased Stroker Clearance for long stroke applications
• Strengthening Gussets have been added around the cap screws to reduce this highly stressed area.
• 100% Thread engagement assures no bolt threads are left exposed in the area between the bolt thread and shank.
• Specifically designed, 260Ksi Ultra Bolts with rolled threads are installed to provide improved engagement for a more consistent clamping load. Callies provides and recommends the use of ARP Ultra torque lube.