Unknown Component

[RVDan]

The interior part looks like a shock mount. The exterior is a ball end with the ball through stud screwed into the shock mount. Probably for mounting something, as others suggested, very possibly an exhaust extension. Common in Europe for noise regulations.

[Planecrazy232]

I’ll go out on a limb and say it’s for a chem trail generator.

[06ktrv6]

Some earlier Eggenfellner Subaru power plants used this for a muffler anchor before an in cowl muffler was developed

[Captain_John]

Originally Posted by Planecrazy232

I’ll go out on a limb and say it’s for a chem trail generator.

EXACTLY!

I have the same one on my plane!

I hear that the current administration is going to bring the program back, so they will become more prevalent!

John

[truflite]

It looks like a muffler bearing. It could be a mount for an auxiliary alternator fluid tank. If it shock mounted, you won't need crankshaft return springs.