How I Saved $4,500 by DIY-ing My VW Sportwagen IS12 Turbocharger – Part 2: Understanding the Turbocharger In my last post (“How I Saved $4,500 by DIY-ing My VW Sportwagen IS12 Turbocharger“), I showed you how I saved $4,500. In this post, I will set the stage and walk you through the different parts of…