QSHIPQ wrote: > Porsche has used ceramic coating in their turbo cars for years. NOT, mind > you, in or on the Exhaust Manifold. Given that they saw the importance of > ceramic coating in production turbo cars, and chose exactly not to use it in > the EM, one has to wonder, "why not"? > Maybe the same reason they liked those big single turbos on the the 911. Randall