Victor Reinz Engine Cylinder Head Bolt Set 2007 Chevrolet Avalanche/Silverado 1500 Classic, 1500 HD Classic, 2500 HD Classic, 3500 Classic - 14-10089-01

Using new head bolts when performing a cylinder head installation is always a good idea however, on late-model engines that came from the factory with TTY (torque-to yield) head bolts, replacement is an absolute necessity. TTY bolts are designed to exert the maximum clamping force for a tight head gasket seal, however they permanently stretched and could fail if re-used.