Sourcing Engine to Header Gaskets

[longballlumber]

I would be interested to hear where others are sourcing gasket material to be used in-between engine exhaust flange OD to exhaust header ID. In many cases when you mixing manufacturers of engines and headers it can be difficult to get gasket materials that can provide the proper fit and sealing between the two. I've had questionable results using "pipe coupler" from different hobby suppliers. Typically, the white, semi-clear (opaque) pipe coupler doesn't like the temperatures typically seen at the engine to header transition and will burn and degrade very quickly.

What are some places to source the proper materials or solutions for that matter?

Thanks,
Mike

 

[pmull]

https://www.radicalrc.com/category/Exhaust-Couplers-542

 

[Jeff Barnes]

A/A Products there a red material

 

[RaceMechaniX]

Pretty sure the Radical RC stuff is the McMaster Carr supplied silicone hose. This holds up for a short time, but not as long as the orange material.
McMaster-Carr