I'm in the process of replacing the stock headers on my 2012 Street Glide with S&S Power Tune Duals. In the service manual it states to replace the oxygen sensor seal with a NEW seal ring.
When installing in the new pipes, should I replace them or just reuse? Header instructions do not mention replacing them.

 

I didn't replace mine, they are just copper crush washers. Make sure you put some anti-sieze on them in case you need to remove later.

 

Thanks for the information. Do they need to appear a certain way to confirm they are ok?
Thanks.

 

They can't be all that expensive. Why not just replace them and remove all doubt.

 

They are the same as spark plug ones. HD does sell them I think they were a buck apiece or less. I got some for stock. Better to replace than to create a lean condition.