What Is a Plenum Gasket?

When pulling out the intake manifold, this gasket is almost always damaged. It is externally fragile and practically impossible to reuse without creating a vacuum leak. Since removing the intake manifold is expensive and time-consuming, it is highly recommended that the plenum gasket be replaced every time the intake manifold is removed. The intake manifold is a part of the engine that supplies a precise mixture of air and fuel to the cylinders.