Be prepared when you remove the intake manifold that you may find more than a gasket issue. My '03 EB had the same leak, but I discovered the gasket is more of a formed O ring seal that sits in a channel molded into the plastic manifold. My manifold had cracked/broken so it no longer contained the seal. I cleaned up the damaged area very well, put some mold release on the old seal and put it back into the channel as a mold. I was then able to reinforce it with some steel (paper clip), and epoxied it with JB Weld. After it cured I installed a new seal, liberally added silicone rubber sealer, and bolted it together before the rubber set up. It seemed to have worked. Much less expensive than a new manifold. Good luck.