Lighting headers to dry tail pipes
#13

You could by their jacketed thru-hull tail extension (541410) they don't look like they weld on like the collector extensions. Other than that you could make any custom setup you wanted but need to have the pipe cooled.
#15
Registered

What is the difference between the 2 diameters? Permatex makes a high temp silicone I use on header gaskets that will work to seal the inner pipe to the outer. Otherwise cut the outer diameter back and tig weld the inner tubes together.