Callies Single Rod Bolt 7/16" x 1.6" UHL (ARP Custom Age 625+) Each

Callies Performance Products began manufacturing high performance crankshafts in 1989. With many years of engineering and employee experience, we have grown to be the industry leader for innovative product design. This, along with our sister company, Energy Manufacturing, and our partnerships with various suppliers, Callies is truly your one stop shop for performance.