What is this?

[hheynow]

This may be a first of its kind...or close to it.
Do you know what it's for?


Then make an educated guess.

 

[kbud14]

It's a paper weight.

 

[trackspeeder]

Part of the flux capacitor.

 

[bushpilot]

how big is it, need something for reference next to it.

 

[hheynow]

height - 3 7/8"
diameter - 3 1/2"
center bore - 3/4"
side bore - 5/8"
material - aluminum billet

hint #1
What sub-forum is this posted in?

 

[Russ]

It's muffler bearing

 

[bushpilot]

ill guess that its a counter-weight

 

[hheynow]

Its weight is not important but its dimension is.

So far nobody is close.

 

[bushpilot]

ok..some kinda spacer ?

 

[hheynow]

Sort of but you'll need to be much more specific.

Hint#2
In my truck it will change temperature, but changing temperature is not its function.