I'm installing Mac's on my girlfriends 99z and need the part number's for GM's exhaust manifold gaskets (to head) and 3 smaller gaskets for emissions hook up. I want to purchase on GMPartsdirect.com. The local GM dealer is closed so I can't call and ask. Is there a link to common part numbers for an LS1 on this site anywhere?

Thanks in advance.

 

12558573 Exhaust manifold gasket

I like the metal gaskets the best. I believe that's what they are.

 

Not to hi-jack the thread but when installing embossed metal exhaust gaskets does the raised part go toward the head or the header flange?

 

^they should be labeled. "head side" or "Manifold side"

 

There's never a shortage of "wise guys"... If the gaskets had been marked I wouldn't be asking.

 

If the original gaskets aren't messed up, then you can reuse them. I did and after being daily driven with headers for over 2 years I still don't have any leaks.

 

Raised side goes outward

 

Thanks for the answer soontobeGN ... best of luck!

 

no prob, let me know if you run into any other problems, I think I had every problem possible when I had my LT1 with long tubes