Ultra connecting rods are made entirely in the U.S.A. Every Ultra connecting rod is produced from specially formulated Timken 4330V steel. 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.
Callies Ultra Series Billet I Beam Rods U17171
Callies Ultra connecting rods are made with pride to exacting specifications. These connecting rods are produced from extremely clean Timken steel, meticulously crafted with great attention to detail. You can choose Callies Ultra connecting rods and be confident of dependable performance and outstanding workmanship.