Just a quick heads up - I haven't verified this myself yet, but I was just told that w/in the last week or so GM may have introduced new lower intake gaskets (again, not the ones I've talked about in the past) that are actually all metal in design, to reduce the possibility of wearing.

New possible P/N:89017816

I don't recommend actually buying this yet, but I'll see if I can verify it here soon -

matt

sure, a few weeks after I do mine...lol

keep us informed. pictures would be awsome if possible.

Not sure yet. It'll be a day or two before I can know for sure. Right now the GM internal system isn't playing nice, and GMPD is spitting out the old PN (by old I mean the recently updated one that I've been posting and had pics for)...

I may be mistaken here, but I believe they only have metal inserts to prevent over-torquing and flattening the gaskets. Just like my TB gasket on the SSEi.

That'* what it kind of looks like on the 89017400 gasket, but if you recall the pics of various failures we've had here, a lot of times the composite around the ports fails, and the gasket caves inwards a the halfway points of each side (don't know if I'm explaining that very well). If this is true, and the entire body is now metal, it should get rid of that problem.

<edit>

I can't connect to the right database right now to check this out, so it might be a few days before I can verify :(

IIRC CGreen said that the whole gasket is metal...

If it is, it'* the new one. I've got one of the '400'* sitting in my basement, and it'* only got metal inserts...

prime example, my gaskets.

Exactly. And tha'* really gross.

yes indeed it is, 10 years & 102,000 miles and that is what my lowers looked like.