I'm getting ready to replace my upper and lower intake manifolds with ported ones and was wondering which gaskets can be reused and which have to be replaced?

It seems the throttle body and the upper-to-lower manifold gasket are the same material and can be reused. The lower manifold-to-head will have to be a new one.

Can anyone confirm for me? Thank you

Latez

 

If you go by the factory service manual they should all be replaced.
However, if they are in good condition (not hard or compressed) you should be OK to reuse them.

For me, I would just replace them... I don't want to worry about chasing a misfire or high fuel trim due to an intake leak.