Header gaskets
Jegs' part # for the ones specific to the LS1 is 760-66032 and they cost $34.99 per pair. Worth it if they prevent leaks, and leaks are a common problem with most headers on LS1/6 heads. Spend the extra money, you will thank yourself later.
many here do the same.. they are metal.. just take a look at them and make sure that they are in good shape.
If not just go to a GM dealer and pick up a new set, they are like 20bux or so. I dont recommend you use any of those Paper/rubber gaskets that they send with new headers.



