Engine Cylinder Head Bolt Set, Victor Reinz 14-32315-01

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 - 2011-13 125i l6 3.0l, 2008-13 128i l6 3.0l, 2006-10 130i l6 3.0l, 2006-11 323i l6 2.5l, 2004-13 325i l6 2.5l, 2005 325xi l6 2.5l, 2007-13 328i l6 3.0l, 2009-13 328i xdrive l6 3.0l, 2006 330i l6 3.0l, 2006 330xi l6 3.0l, 2004-09 525i l6 2.5l, 2007 525i l6 3.0l, 2010 525i l6 3.0l, 2007 525xi l6 3.0l, 2008-11 528i l6 3.0l, 2009-10 528i xdrive l6 3.0l, 2006-10 530i l6 3.0l, 2012-13 530i l6 3.0l, 2006-07 530xi l6 3.0l, 2010-13 x1 l6 3.0l, 2009-11 x3 l6 3.0l, 2009-10 x5 l6 3.0l