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Re: Thermal Coatings

  From the turbo on back you do *not* want to coat or thermal-wrap the
  exhaust. You want the exhaust to expell as much heat as possible to lower
  the density and volume of exhuast gasses to be expelled, this reduces
  backpressure and helps to decrease turbo lag and bring the boost up
  faster. Do all your coating/wrapping before/at the turbo, turbine side
  only. A Pro-Rally guy I know wrapped both the exhaust manifold and the
  turbo and he says the performance improvement is noticable. Wrapping of
  cast exhaust manifolds is NOT recommended though, due to the increased
  possibility of cracking. I may look at the possibility of coating the SS
  header for the Killer ur-Q Engine From Hell project.