My headers arrived from the US in only 5 days, which is pretty good going! They cost me $549 USD, ($523 AUD), plus $200 USD, ($190 AUD), for the freight. They are the OBX ones which look like a copy of the Kooks design.
Here is what the factory cast manifold looks like.
Talk about a difference!
The headers are made from 304 polished stainless steel and run 1 7/8" primaries and 3" collectors. Nice 3/8" thick stainless steel flanges too.
Big difference in outlet size!
Was surprised to see a transition spear on such a cheap header too!
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Here is the main difference between the 05-08 5.7 Hemi and the 6.1 SRT8. The SRT8 has D shaped port versus the square of the 5.7. From 09+ with the VVT, they 5.7 and the 6.1 share the same port shape. Strangely, most 5.7 headers are sold with round ports so don't match up well anyway!
Good thing about the port shape difference is that the D shape equals the height of the 5.7 and there is nothing in the way to impede flow.
Close up of port shape difference. There will be no trouble with the flow coming from the smaller square port into the larger D shaped ones of the header.
