They were the cork ones but my mechanic said he used enough rtv that he wouldn't worry about it

 

If it were me I would r&r the intake, and install it using the Mopar gasket set, lot's of rtv is not always a good thing. The intake comes with a install sheet and it has a parts list on it that list should be followed.

P4876049 Intake Manifold Gasket Set (5.9L Truck Magnum/Jeep Engines) 33.25

I have a Felpro gasket set here that has the cork end gaskets and I will not use it with the M1 intake.

 

My fel-pro set had rubber/viton/whatever end gaskets..... Not sure what the difference between sets is.....

 

In my op the cork end gaskets are to thick and to firm for the M1 to seal right.

 

Any pictures!?