I just got these pics from Pat and thought everyone would want to see them?
The primaries are 2". The assembly is stainless.
The "S" tube is what he recommends for 500hp engines (or more).
They are 3" at the header flange and reduce down to 2-1/2". In reality they are acting as a "collector", or extending the minimal collector that the headers have.
That fits to the "old" Ford recommendation of using a 3 to 3-1/2" collector about 6" long for racing purposes.
He said that the engine he dynoed these on went from 497hp to something like 597 with adding the collector.
The "issue", if you can call it that, is that you need better mufflers then the ANSA's so these headers are most effective with using his "twin packs".
So the headers are $1,500 bare, plus $250 to ceramic coat them and I don't know how much for the muffler/exhaust pipes? I forgot to ask.
Bottom line, you need to weld on your stock exhaust pipes to mate them to the headers WITHOUT the "S" tube and you can't use the "s" tube collector with the ANSA's at all.
He feels confident that you can have these coated before installing them in that you won't need to use a hammer on them anywhere to clear unexpected obstacles.
I love the "S" tube "collector". It's very clever.