This is a Garrett Formula 1 Turbocharger Turbine Housing. I am not sure of the era. I just managed to see this one time and thought to myself: self: they are going to make stuff like that available to the public one day very similar to this very design. Tial brought it too the table I would say. I am not real sure what it is made of but it is probably the lightest turbine housing on the planet?
Disclaimer: NOT FOR SALE