[enslow]

Thanks for your reply.

So far most people I've talked to say the GM aluminum gaskets are a permanent repair for the LIM. I haven't been convinced that Felpro would outlast the GM aluminum gaskets.

I know what you are referring to with pinned vs non-pinned. GMPartsDirect does not post pictures of the gaskets, but their site clearly states that one is for supercharged motors, the other one is for naturally aspirated. One answer I got from another site is that the naturally aspirated is the plastic gasket, and the supercharged is the aluminum, and to go with the aluminum (for supercharged engines) in my NA 3800.

I guess as long as I know for certain that part number 89017816 will definitely work on NA motors, I'll get it.