Thanks for your feed back. I was thinking that with only 5 psi of boost if the intercooler hosing were to break I am not really going to have a major problem (I should be able to drive to the next garage OK albeit with unfiltered air going in the intake).
...and maybe the temperatures will be a lot lower on the tubo/induction pipe than on a higher pressure install so a lower temp hose (150 degrees celcius rating) is unlikely to fail in the first place?
The other reason I ask is that I am trying to work out if an intercooler will actually give me a gain in power with ths little pressure. I am likely to see a 1.5 psi drop in pressure through the intercooler and I am wondering if the lower air charge from the intercooler will gain me more than I lose from the pressure drop of the intercooler?
I am pretty new to this (although I have modified lots of normally aspirated engines in the past), so any help appreciated.