Engine Cylinder Head Bolt Set, Victor Reinz 14-32001-01

Engine cylinder head bolt set 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.aplication summary:bmw - 1984-87 325e l6 2.7l, 1987-93 325i l6 2.5l, 1989-91 525i l6 2.5l