commenly know as the BOV(bottle of vodka).....no,Blow off valve...
it is simply a bypass valve with a spring,and a diaphram that is feed from after your TB....when you close the TB,there is an instant vaccume that opens the BOV and releases any compressed air from the other side of the TB....
you can fit these on almost any forced induction car...
your car is fitted with an electronic bypass(VDO) which can be vented into the air to give a similar result...
it will not provide a performance upgrade on your car,but is possible on higher output cars,or modified turbo cars if the bypass system was not already adequate