Throw away the front and rear seal, run a bead of the gray silicone in there place about a 1/4 inch thick and let it set for about 4-5 hours, then carefully set the intake on. I always dip my finger in
oil and spread it on the bottom of the intake where it sets on the silicone, in case your not aligned correctly this will give you a little movement without screwing up the silicone, works for me!.....
Don't forget to put a dab of silicone on the intake gaskets where there notched for gaskets.