Using the Injen EVO1901C cold air intake is straightforward. First, make sure your vehicle is turned off and cooled down. Then, follow the installation guide step - by - step. The Twist - Lock System makes it easy to install with fewer parts and tools. When using your vehicle, the intake will automatically improve air intake and power. For maintenance, check the 8 - layer oiled cotton gauze air filter regularly. If it gets dirty, clean it with a suitable filter cleaner and re - oil it. Make sure to tighten all the clamps and connections during maintenance to ensure a proper fit. Also, keep an eye on the silicone couplers for any signs of wear. If you notice any issues, replace the parts promptly.