Intake Manifold is part of your car's engine whose function is to equally distribute the fuel-air mixture to each of the cylinders. Your vehicle needs the right amount of fuel-air mixture at the right time to reach its full efficiency. It is usually bolted to the engine block. They have a series of hollow channels or ports that are fitted to line up with the heads of the engine's cylinders. Intake manifold receives the air-fuel mixture from the carburetor or fuel-injection system and releases it into the cylinder during its intake stroke. A leak in the intake manifold can have adverse effects on your car's engine. A leaking manifold will result in the manifold sucking in extra air from outside through the leak. This will cause more air to enter intake ports and disrupt the air-fuel ratio in the cylinders. This reduces the engine's efficiency.