A new proposal for those seeking improved performance and fuel efficiency through earth tuning. With conventional earthing, the most common method is to connect the battery's negative terminal to an earth point. But, think about it. What happens if you disconnect the battery while the engine is running? Those with some knowledge will know immediately. That's right, the engine doesn't stop. This is because after the engine starts, most of the car's electrical components are powered by the electricity generated by the alternator. The alternator's earth is the engine itself. You should understand what I'm getting at by now. Many of the vehicle's electrical components are earthed to the body and pass through the vehicle's metal parts, returning to the battery's negative terminal and the engine. The battery's negative terminal is connected to the body. It can be said that connecting to the engine itself more effectively is more effective than gathering all the earths to the battery's negative terminal. DIY-LIFE's new earth tuning proposes to effectively earth the vehicle by connecting the body and the engine.