I'm about to remove the Plenum to replace the intake manifold gasket and have a couple of questions:\n\n1. Is this a dry gasket or does it require either black or red silicone?\n\n2. Can someone explain the difference in these two different offerings? One shows a three piece set and the other only one gasket. Which one is appropriate and which should I be using?\n\nhttp:\/\/shop.advanceautoparts.com\/p\/felpro-intake-manifold-gasket-set-ms-92270-4\/20688165-P\n\nhttp:\/\/shop.advanceautoparts.com\/p\/felpro-plenum-gasket-set-ms-92273\/99992846-P\n\nI think they are upper and lower gaskets but I'm not sure. Definitely would like to know if all should be changed and whether special silicone should be used.\n\nThanks in advance!