The circular logic is inapplicable.
Have you seen the casting apparatus for a BMW composite manifold? No, and you're not likely to.
Here's a better parallel for you: years ago, there was a technical piece published about the special materials and methods used to make it. It is no longer available, yet clearly it is done.
I think you missed my previous point about why a manufacturer might not want to discuss certain aspects of some product for reasons of negatively impacting their other products... especially as the "premium" product they make is privately-labelled for the vehicle manufacturer.
Last edited by Rob Levinson * UUC Motorwerks; 03-26-2007 at 02:46 PM.