ok just wondering if i could legally run the fuel lines, and the brake lines, and perhaps a water pipe or 2 thru the tunnel sucessfully? or would this be illegal, also will the waterpipe fit at all? im thinking not but just wondering if anyone has done it with sucess, any issues that arent legalities relating to this also...

Yes,it can be done. Fitting water lines makes it all a bit squishy though.

thanks for the extremely fats answer mick, if its too squishy whats the alternative route for them? other than under then pan cos that just seems stupid to me

Some guys run them in the heater channel or along side it. If you are going water cooled you wont need the vw heater system anymore.

Brilliant idea!

Have a look at the pics here http://www.vwdcqinc.org.au/insideabug.html 
or if you would like to see a tunnel open in the flesh, give me a call

hot damn thats messy in there, im pulling the bottom sheet off the tunnel to coat it and remove rust etc so i should be sweet, it will have to be ALOT neater than that to work properly aswell