I can't see pictures of his 6.1 hemi headers that are built for the 300C (SRT8) but I can tell you this about these guys.
I cut and mocked up a couple of tubes for a special set of headers in a car I was doing. Took the header down and showed it to Stan... I wanted him to mandrel bend the two tubes for me and he says "just a minute". He goes back into the shop and comes out with a header that is one of their mock up sets.. and says - try this. It fit perfectly. Turns out it was the mock up for the Art Morrison 62 Corvette/Morrison chassis... which is now a stock part number.
The amazing part was that this guy could look at a pile of spaghetti and recognize a similar pile that would work.