Cylinder head bolts are high-strength, often torque-to-yield (TTY) fasteners that create the clamping force needed to seal the head gasket properly. Reusing old TTY bolts or using incorrect torque values is a primary cause of head gasket failure. A complete new bolt kit is essential for a reliable repair. Our cylinder head bolt kits include all new bolts and washers required for the specific engine. These premium fasteners ensure the correct and consistent clamping force is applied, which is absolutely critical for achieving a permanent, leak-free seal with the head gasket.