Using your Injen cold air intake is straightforward. First, make sure your engine is cool before installation. Locate the original air intake system in your 1996 - 2000 Honda Civic CX, DX, LX, or 1999 Civic Value Package and carefully remove it. Then, install the Injen intake following the included instructions. Once installed, start your engine and enjoy the increased power and the great sound. When it comes to maintenance, regularly check the Injen SuperNano - Web dry air filter. If it looks dirty, you can clean it according to the cleaning guide provided. This will keep the filter working efficiently and ensure the intake system performs at its best. As for safety, always follow the standard safety procedures when working on your vehicle's engine. If you're not confident in the installation, it's a good idea to have a professional mechanic do it for you.