Ultra connecting rods by Callies
For the Small Block Chevy and LS1 engine families
Ultra rods are now available for the Small Block and LSx Chevy engines. Every Ultra connecting rod is machined from Extremely clean Timken steel that is produced to Callies exact requirement. Ultra’s are available in a wide range of lengths and journal diameters. These rods are fastened with a purpose built 260Ksi Ultra bolt. Custom Age 625 cap screws by ARP are available for extremely demanding applications. Ultra rods are designed to withstand 1800 HP plus applications.