2001 f150 What exactly are the intake spacer gaskets and isolator bolts?

I need to replace intake spacer gaskets and isolator bolts to get rid of the check engine light on my 2001 Ford f150. Can someone point me in the right direction as to what exactly I need to buy? A part number would help!

Probaly a lean code? The bolts run down through the top of the intake and the seals start to contract and get old. There was a TSB released to check these seals for leaking when cold. Basically the engine sucks a bit of unmetered air into the manifold that is not being measured by the maf sensor. They are a breeze to do!