16813-65 Cylinder Head Bolt Kits for Sidevalves

These Colony cylinder head bolt kits are the gold standard for vintage Sidevalve restorations. Each kit is accurately machined from high-strength steel and hardened to original Harley-Davidson specifications to prevent stretching under the heat and pressure of a running engine. The bolts feature rolled threads, which offer superior strength and a much better fit than cut threads. This kit is sold as a set and includes the necessary head bolts, nuts, and washers, all of which are plated for excellent corrosion resistance and a clean, professional appearance. This specific kit fits 45CI and Servi-Car Sidevalve models, replacing OEM number 16813-65, making it a reliable choice for any Flathead engine build.