3201 Piston ring end gap tool

Precision is the hallmark of a good engine build, and this JIMS piston ring end gap tool is designed to help you get there. This universal tool is specifically sized for larger bore applications, fitting 4.125 inch and 4.310 inch bore pistons. It ensures that your piston rings are seated perfectly square within the cylinder bore, allowing for an accurate measurement of the end gap. Without a tool like this, it is easy to get a false reading that could lead to engine failure or poor performance. Built to the high standards JIMS is known for, this is a vital addition to the toolbox of any mechanic working on large-displacement Harley-Davidson engines.