I did not realize so many manifold combinations existed......mostly Cast. I am installing a 2014 6.4 Challanger mill in my 64 Valiant. The manifolds are typical of most late model performance engines (I have been involved in CTS-V and Coyote transplants) all have factory stainless headers. In my build I cut the pipes off the flanges and rewelded them to work in my application (tight to the block)
