[Tom of VA]

Ray,
I think all the pipes are the same. Only the headers are different. The header will locate the pipe in the opening. My Superformance has a FE and I have three friends with small blocks and one with a 460 and I can't tell the difference between the pipes. I will check with Hillbank or Dennis to verify that all pipes are the same other than the finish. I replaced the gaskets for my pipes last year and I was told there was only one gaket and one type of pipe. I will post my findings on Monday. Thanks for your question.
Tom