Welcome to the world of Forced Induction! If you’ve purchased your first turbocharged Audi or VW vehicle, you may be wondering what the difference is between a diverter valve and blow-off valve and which one you should purchase to upgrade your vehicle. A diverter valve and blow off valve are two completely different pieces of hardware. Each has pros and cons depending on which system they are being used on. We will discuss the differences between the two and what would work better for your specific setup.