Head Bolt Set

DNJ Head Bolt Set DNJ® Cylinder Head Bolt Kits are precision-engineered assemblies designed to secure the cylinder head to the engine block, ensuring a proper seal and maintaining engine performance under extreme thermal and mechanical stress. Each kit includes high-quality head bolts, or in some applications, studs-and-nuts along with hardened steel washers, to ensure accurate torque application and consistent clamping force. DNJ® Cylinder Head Bolt Kits are built from durable, heat-treated carbon or alloy steel. Manufactured to meet or exceed OEM quality standards, these bolts offer excellent strength, fatigue resistance, and stability under high pressure and thermal cycling critical for maintaining long-term engine performance and gasket sealing integrity. It is important to note that Torque-To-Yield (TTY) head bolts must never be reused, as reinstallation can compromise clamping force and lead to engine failure. DNJ® also offers a wide range of related components such as head gaske