If you need a quick boost in HP, at an affordable price, then a BMW 328i aftermarket cold air intake is what you need. Adding a cold air intake to your 328i will do many things. It will improve the way it runs by.

•       Improve Gas Mileage for the 328i
•       Increase Horsepower for 328i
•       Deep Throaty Sound for 328i

Cold air intake are the more popular model because they are larger in size and increase the amount of flow of cool air to the fuel combustion chamber.

The reason why you want cool air going into your engine instead of hot air is basic science of an intake. Colder air has more oxygen molecules because of the higher density. This in turns causes better ignition.

As we know most people are frustrated with the skyrocketing gasoline prices. Many people want to get the best fuel consumption rate from their 328i and rightly so. The only way to get the best gas mileage is by pushing your car around where you want to go.

A cold air intake system is designed with several things in mind. One of these is to put the inlet for the airflow as far away from the heat of the engine as possible. This is how a cold or cold air intake system received its name. By reducing the incoming air by 10 degrees you would receive a 1% increase in horsepower and torque with the 328i intake.

Claims for outlandish increases in horsepower should serve as a red flag to you. Modest increases of 10, 15 or 20 horses are certainly reasonable for your 328i model of your vehicle with any intake.

Denser, colder air acts like food for your engine throught the intake. The lower the temperature of the air entering your engine through the itnake , the more efficient it runs. If a 328i engine could speak it would say, "give me cold air."

Adding a cold air intake to your 328i will more than satisfy your urge for performance.