Unlike many manufacturers of cold air intakes these days, Injen manufacturers all of its parts in the United States and oversees every step of the process, from selection of the right materials to each individual bend in the intakes’ tubes. Because of this level of attention and detail paid, Injen Cold Air Intake Tubes are some of the best cold air intake tubes you can buy. These intake tubes are dyno tested to ensure the highest level of performance. Each Injen Cold Air Intake Tube is designed to maximize airflow by providing the smoothest, most direct route possible to the engine. This way, air does not bottleneck up in the intake, building up pressure and hampering the power the engine puts out. These Injen Cold Air Intake Tubes make a great upgrade if you already have a cold air intake system. Because cold air is denser, it can hold more oxygen, and it is oxygen that makes fuel combust. In the presence of more oxygen, the fuel burns more completely, and as a result, the engine will put out more power and torque – and perhaps even show a bit of improvement in fuel economy, too. Auto hobbyists are entitled to high quality information and support when ordering reliable parts for a car or truck. Thus, we created a twenty-four hour a day support bureau to help you with your queries. Everybody hates to pay for shipping, that's why there is always completely free shipping for all orders $50 or higher. If you spot a better price somewhere else, let us know - we will beat any advertised price for auto parts.