Mazda3 Cold Air Intake. Bring cold air from outside the engine compartment into the engine through mandrel bent 2.5 inches diameter, polished and powder coated aluminum tubing. The intake system is designed for improved engine breathing, while re-using the stock MAF sensor. Kit includes washable and reusable conical filter. Legal in all 50 states except 2006-2008 with California emission. 2004-2008 2.3L engine only. When you select a genuine OEM part - you can rely on the high quality and effectiveness of the product and brand without having to guess if the product will work in sequence with your vehicle. Protecting your investment is important and choosing the right parts can be challenging. Stick with what you know and choose a genuine OEM part. Fits: 2004-2009 Mazda3.