Thanks for the replies.
I need to clear up a few things as my first post was not as informative as it should have been. I apologize for that.
The header pictured on the website is indeed a prototype. It was done for a customer who wanted to get on the road A.S.A.P. and needed a working solution.
The flanges were outsourced and we were not happy with the results. This is why the pricing is not yet fixed, we are still trying to find a process that is of acceptable quality and price.
All we have to work with is the old manifold. This put considerable constraints on the design, and pretty much forced us to make a stock replacement. If we had access to a vehicle we would like to design an equal length header, downpipe, and full exhaust system with or with out hi-flow cats.
High temp coating will be available as well as 304 Stainless Steel.
Mark