Can anyone tell me what size/pitch/etc. the nuts are that hold the upper intake manifold onto the lower intake manifold? When I bought my '86 GXL, the upper mani had been removed and there was no sign of the nuts. I don't have a tap and die set so I can't really measure. The help is appreciated.

 

M8.

There is a thread in the Archives which lists the size and pitch of every thread commonly asked about.

 

Thanks a lot. I thought I saw that thread, but couldn't find the nut I was looking for. Guess I must have missed it.