3200 Piston ring end gap tool

Getting the piston ring end gap exactly right is critical for engine longevity and performance. This JIMS piston ring end gap tool is a universal shop essential designed to help you achieve precision measurements every time. This specific version is sized for 3.875 inch and 4.000 inch bore pistons, making it ideal for many popular Big Twin and aftermarket performance builds. It allows you to square the ring in the bore perfectly so you can get an accurate feeler gauge reading. If you are building a motor, do not guess at your clearances; use a dedicated tool like this to ensure your rings are gapped to the manufacturer's exact specifications.