Originally Posted by yo_marc

There is a gasket.. it's on the intake side of things. If I recall right, it wasn't a typical o-ring, it had a pronounced lip to it. (the picture below is over-exposed so it's hard to make out).

The lip and the condition of the rubber looked good, so I didn't replace it. I have heard that others out here do, possibly with a different part number - Again, if I remember right, it's to help alleviate a rather annoying intake whistle that some members have.

I do have the whistle.. and I should have mentioned that the whistle got a little more noticeable after I cleaned the throttle body and mounting flange.