106-4456 Oil seal oil return line for Knuckle/S&S KN tins

This S&S oil return line seal is a specialized rubber hose component designed for the oiling system of Knucklehead engines. Measuring approximately one inch in length with a 0.28-inch outer diameter and a 0.18-inch inner diameter, it provides a critical seal for the return lines. It is compatible with 1936 to 1947 Knucklehead models using OEM or S&S KN tins, as well as all S&S KN-series engines. Proper oil circulation is vital for these classic designs, and using high-quality S&S seals helps prevent leaks and ensures consistent oil flow. This small but essential part is a must-have for any mechanic working on a vintage Knucklehead or a modern S&S tribute engine.