Induction System
WARNING: This page is about a different car, the 2002 Oldsmobile Aurora and 2001 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
The induction manifold is a plastic, lost core casting with a removable plastic sight shield cover. The manifold is sealed to the cylinder heads via imbedded silicone rubber around the intake ports. These gaskets are integral to the manifold and are designed to last the life of the engine.