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Intake Manifolds & Components

The intake manifold channels the air needed for combustion into the cylinder head intake ports. The air enters from a central point, a carburetor, or on fuel injected engines a throttle body, and then travels through individual passages called runners to the cylinder head(s). Depending on the vehicle model, the intake manifold can be mounted either on top of the engine between the cylinder banks, or at the side of the engine, attached to the cylinder head.

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On carbureted engines and fuel injected engines with Throttle Body Injection (TBI, also called single point injection), the intake air mixes with fuel as it enters the intake manifold. On multiport fuel injected engines, fuel is introduced to the intake air stream by individual fuel injectors located at the ends of the intake manifold runners. Newer engines with Gasoline Direct Injection (GDI) inject fuel right into the combustion chambers, so the intake manifold delivers only clean air to the cylinders on these engines. Cast iron or aluminum used to be the materials of choice for intake manifolds, but today most manifolds are made of plastic (technically a composite blend). Plastic is much lighter, so it helps in the quest for greater fuel efficiency, and it dissipates heat better than metal, so the intake air charge stays cooler for better combustion.

We aim to provide our customers with the finest Intake Manifolds & Components the industry can offer, which is why we accept no compromise when it comes to the quality. Created by the most reputable names in the industry, such as Dorman, Bosch, Auto 7, Fel-Pro, Victor Reinz, Standard the Intake Manifolds & Components we've gathered for you feature precise design and everlasting durability.

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Many intake manifolds have an upper and lower half. The two halves and the intake manifold to cylinder head(s) junction are sealed with gaskets and secured with bolts. The carburetor or throttle body are attached to the intake manifold in the same manner. The integrity of the seal at these junctures is critical and all surfaces must be clean and smooth when new gaskets are installed to prevent air leaks that could cause a lean air/fuel mixture, rough idle, and poor performance. On many V engine designs the intake manifold also serves as the valley pan, and the ends of the manifold are sealed to the cylinder block. Care must be used here when gaskets are installed or oil leaks could result.

Some intake manifolds have coolant passages and incorporate the mount for the thermostat. On older V engines with carburetors or TBI, an exhaust crossover passage was cast into the intake manifold to heat the manifold and improve fuel vaporization when the engine is cold. Modern fuel injected engines are computer controlled and the computer depends on inputs from many sensors to regulate engine operation. An Engine Coolant Temperature (ECT) sensor may be mounted in an intake manifold coolant passage to provide a coolant temperature signal to the computer, and the air temperature in the intake manifold may be signaled to the computer by an Air Charge Temperature (ACT) sensor mounted in an intake manifold runner.

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Guides & Articles
An intake manifold is an integrated assembly that sits atop the engine, consisting of a series of tubes which distribute fresh outside air to each and every cylinder. On V-shaped engine blocks, an intake manifold typically sits between the two cylinder banks while inline engines may feature a manifold to the side of the cylinder head. Intake manifolds serve as a...
The easiest way to improve airflow to your engine is just by changing your stock air filter to an aftermarket performance air filter. There’s an aftermarket air intake system for every budget and every application. Even if you have a hot rod or custom car, or if your car’s just not listed in a catalog, you can still get a quality system. Everyone, regardless of...
If you've heard something about air intakes but not sure you need one, here's the ultimate guide for you. Learn the ins and outs of an air intake system and find out the benefits of using a cold air intake for your vehicle. We'll explain what these systems do for your ride and why you need one.
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Intake Manifolds & Components Reviews
Average rating: 4.5 4.6 - 11 reviews
2004 Toyota Highlander | Posted by Todd | (Atlanta, GA)

Beats me if it does anything or not but it sure is cool to say I have a "Ram Air" intake on my vehicle! I am going to order this kit for all if my other vehicles that run another brand intake and adapt it to them!

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