A Saturn that actually looks pretty good would turn really awful if suddenly it stopped because of fuel loss. Fuel is the lifeblood of a vehicle. The inadequate supply of this auto product to the system of the machine would consequently impair the whole operation. Whereas, its adequacy would readily provide enough source of power for a performance that showcases the true prowess of the vehicle's engineering. Delivery of fuel to the engine system is taken cared by the auto component called the intake manifold.

The Saturn intake manifold is an engine part, a system of passages that supplies fuel and air to the cylinders through runner ports. It is also known as the inlet manifold of the induction system. The air that enters the cylinder is being mixed with the fuel. This mixture is meant for processing of the power source through combustion and ultimately in power generation. Aside from acting as passage for the two important elements in combustion process, the intake manifold is the one that charges the cylinders with even strength and quality. This way, efficient engine operation is achieved, bringing then smooth performance. A Saturn that features multi point injected engines also lays responsibility of holding the fuel injectors to the intake manifold.

Saturn intake manifolds vary in designs. Each design is applicable only to certain engine types. There are tunnel ram, cross ram, open plenum, divided single plane, single plane with partial divider plate and isolated runner intake manifold. Their variations according to type and application also led to differences of locations wherein the operation effectiveness is as well affected. V8 engines mount their intake manifolds between the cylinder heads. Others are found between the carburetor and the cylinder head. L-head engines have their intake manifolds integrated to the side of the block, while I-head manifolds are typically bolted to the cylinder heads.

The quality of intake manifold performance depends on its design. In this aspect, fuel charge plays a large part. Dry fuel vapor is an ideal form of fuel charge. But in modern intake manifold designs, fuel charge efficiently works only when the temperature is high. This is because most types of fuels today prevent the kind of fuel reaction. The problem then rests on the effect of too high temperature that's capable of reducing the power of the engine with the heat-expanded fuel charge. By depositing some fuel on the walls of the cylinders and manifold vents from which modern designs of intake manifolds are based, the effect of condensed fuel is reduced to a minimum amount.