If you want superior filtration and optimum power in your 2003–2005 Nissan 350Z drive, it is time to replace your stock Nissan 350Z Air Filter with the K&N Air Filter. What is with the air filter that makes it so important? The air filter is the air intake component that gets initial contact with the air flowing into the engine for the burning of fuel. Its main task is to filter the incoming air in order to trap air particles that may cause damage when they reach the engine. Stock filters are usually made of paper, and they easily get clogged with dirt after a time, resulting to restricted airflow and poor engine performance. K&N solves this problem with its K333320312 K&N Air Filter. The air filter from K&N is designed for a lifetime use. How so? The K&N Air Filter is made from cotton gauge material that not only allows more air to flow through but does not also need to be replaced when already dirty. All that it requires is periodic washing and cleaning every 50,000 miles. As such, it is not only a money-saver but is also environment-friendly. And added to all these benefits, installing the K&N Air Filter is also a no-sweat job, something that you can do all by yourself! Search no more and get the K&N Air Filter in our online site! We believe in quality products and quality service, and those are exactly what you will get when you shop with us!