Stock turbo diesel exhaust manifold material (NiCr 202) - FAQ/Tech Tips/Please Read First - VWDiesel.net The IDI, TDI, and mTDI source.

• Stock turbo diesel exhaust manifold material (NiCr 202) by saurkraut on 25 May, 2009 18:06
• Nickle Chrome 202 (NiCr 202).  Same stuff that the K24 turbine housing is made of:
  
  
  
  Explains why HSS drills have a tough time drilling EGT probe holes.  Cobalt bits go through it like a hot knife through butter.