1.8T VAG engine don't use a dump valve (the releases pressure to the atmosphere), they use a recirculating valve that dumps it back into the exhaust system. We get a subtle whoosh, not the psshhhh you hear on modded Scoobys. To get a dump valve, or blow-off valve, you need to get some adapter that I assume closes the re-circ loop and then dumps the pressure externally. Forge do both, so it depends if you want to increase the performance capacity if the car by upgrading the re-circ valve, or if you want the show-off bonus of a dump valve.
