I just received my new intake gaskets. I'm some what confused about the end seals however. I received the end seals but they also sent silicone to use instead of the seals. My brother said when he changed gaskets on his firebird that he used the silicone instead. Is one better? Which should I use?

Most people think the silicone is way better than the gasket.
Personally, i prefer gaskets. Think about this for a second, if you ever have to remove it again, you will be scraping all that crap out of there.
Id say go with the gasket, aslong as its all tourqed down correctly you should be good to go.
Let us know how it goes!
Also What Year and Trim line (LE,SE,SLE,SSE,SSEi) is your car?
Very helpful info!

The Silicone is provided in ADDITION to the gaskets! You apply the silicone to the corners of the gaskets where they meat with the side gaskets (where the cyl head meats the intake manifold). This is done to make a slightly better seal than just using the the gaskets alone. If you FAIL to do this IT WILL LEAK AGAIN!