The 3190-181 CV head is designed for Toyota applications as a 1310CV conversion, featuring an increased bushing for OEM tubing. It belongs to the 1310 series and is classified as light-duty (LD). The head has a tube diameter of 2.560 inches and a wall thickness of 0.067 inches. The butt diameter measures 2.435 inches, with a pilot diameter of 1.808 inches. The bolt circle diameter is 3.575 inches, and the bolt hole diameter is 0.331 inches. The end-to-weld length is 5.75 inches, supporting a joint angle of 26 degrees. This CV head is designed with lubrication provisions.