Fitted my snorkel last week (& tested it out @ Bures last Sunday). 
All went pretty well, the end cost £17 off eBlag, 2" steel tube cost a fiver & 2 metre length of hose cost me a tenner. 
The hose is threaded, so screws into the inlet on the air box nice & snug. It is also a perfect fit onto the pipe as well 




 :D