Are These Thermal Reactors?

[lbbdoc]

Total newbie here. Car is a 1976 911S and my oil change guys are more familiar with newer Porsches, but they think these are thermal reactors. They don't look like the ones I have seen online which look more like canisters. Previous owner had engine rebuilt and added 11 blade fan, so wondering why he would have left the reactors. Sorry about the pics, I don't have a lift.

[dg567]

Not thermal reactors - later style exhaust system.

[75 911s]

No those are standard heat exchangers.

These are thermal reactors:

[Geneman]

Fusion Plasma Containment vessels. superconducting and made of unobtanium....

[lbbdoc]

Thanks, that's what I wanted to hear. I appreciate your response.

[lbbdoc]

Thanks.