Toofunkyhouse: Yep sure will, it'll work on any car! I did this on my 1.6 driver, and it made a HUGE difference becasue it had been running rich for months due to a dead autochoke. It was also dead easy to do, I could just trickle water straight down the carb, unlike a GTI where it wont run without the inlet system attached.
Rowlers: I would use a vacuum hose as close to the throttle body as possible, you should be able to find a handy one somewhere

I have to add you don't usually need to do this, but if the car has been running badly for a while and you suspect carbon has been building up, its a nice free thing you can try. When an engine is running well it should be relatively clean inside, though lots of short journeys can cause the carbon to start building up.
Oh and make sure the engine is warmed up before you get it sucking water
