As a long-time Land Rover owner and enthusiast, I've always been interested in improving my vehicle's performance and reducing maintenance costs. Recently, I decided to take on the DIY project of installing an air filter upgrade on my Discovery 3. The process was surprisingly straightforward, and I'm excited to share my experience with fellow forum members. This step-by-step guide will walk you through the installation process, including selecting the right filter, accessing the airbox, and finalizing the setup. Whether you're a seasoned mechanic or a DIY novice, this guide is designed to be easy to follow and help you get the most out of your Land Rover's performance capabilities.