Flange Adapter Kit, mounts Greddy RS BOV into stock diverter location on FWD 2.0T FSI engine. Includes specially 3D machined mounting adapter and special insert plug to add on to the horn assembly (also includes all mounting bolts for easy install). Converts the Greddy RS BOV into a mechanical diverter valve that mounts into the stock location and completely replaces the leaky electronic diverter valve. Unit has been thoroughly designed to bolt up to the stock turbo compressor housing and return the vented air outlet back into the compressor as the factory intended. There are no negative side-effects of this solution, only a certainty that there will be no boost leaks from the diverter valve. The way the car runs and idles is 100% perfect and factory smooth. The adapter kit installs just like replacing a stock electronic diverter valve using the 3 factory bolts, it sits at a very low profile, then the Greddy unit bolts on top of that