After buying a Forge TIP from Welly, i went to look at taking my original Audi TIP off my car today, and noticed that one of the hoses which goes into the front side of the TIP has near enough broken off, and is hanging onto the TIP by a few strands. The pipe goes from the TIP to a round black plastic thing (Not the DV) which sits to the right hand side of the engine block and in front of the TIP. Can anybody tell me what this does please? I suppose now it was a good job that i bought the new TIP when i did Also cheers again Welly! Cheers, Ash.