Gapjohn

Whilst changing my turbo hose (the 90 degree one) I've managed to break the little black plastic pipe which comes off the turbo. I'm making the assessment that it's a vacuum pipe, and I've wrapped a whole load of tape on it for now. It seems to work OK, the turbo kicks in with seemingly no loss of power, but it's far from a permafix, so I have two questions:

A) What is it? B) how much will it cost me to fix it properly?



Thanks in advance