How to use: First, make sure your vehicle is turned off and cooled down. Then, follow the provided installation instructions to install the EGR blocker kit. This kit is designed to be easily installed with very little effort. Note: Custom tuning is required for this kit. Make sure to have it done by a professional or someone with experience in vehicle tuning. Maintenance: Periodically check the kit for any signs of damage or wear. If you notice any issues, replace the parts as needed. With this EGR blocker kit, you can improve your vehicle's performance and avoid potential EGR cooler failures.