The 2.0T is a complex engine which is controlled by numerous electronic valves and solenoids. The 2.0T is equipped with an electronic diverter valve to vent boost pressure when letting off the throttle. In order to retain the factory diverter on many custom turbo setups an adapter is needed.
The Spulen adapter is CNC’d from billet aluminum and accepts factory diverter valves as well as aftermarket units such as Forge or Go Fast Bits. The inlet and outlets of the adapter are 1” diameter for easy connection.