7712-36-Z Head bolt kit

When working on vintage Sidevalve engines, having the right fasteners is non-negotiable. This Colony head bolt kit is an OEM-style reproduction designed specifically for models with cast iron heads. It fits 1937 to 1948 74 and 80 cubic inch Sidevalve Big Twins, as well as 1929 to 1950 45 cubic inch Sidevalve models. Each bolt in the kit is finished with a durable zinc plating, providing a classic look that matches the original factory hardware while offering protection against the elements. These are high-strength fasteners built to handle the thermal stresses of a running engine. For any mechanic or restorer working on a classic Flathead, this kit provides the peace of mind that comes with using hardware engineered for these specific vintage applications.