Latest revision, Genuine IHI OEM IS38 turbocharger. The IS38 turbo can be found on the MK7+ Golf R, Audi S3, Audi TTS, and Arteon. It is a popular upgrade for VW and Audi MQB platforms and is a direct bolt-on turbo upgrade that requires a tune that supports the IS38. The IS38 can be swapped onto vehicles that came with IS12 and IS20 turbos from the factory. New spark plugs, gaskets, and hardware are required for installation