Torn air intake hose on LPG-modified car. Replace or ignore?

[Bas]

When I bought my Aveo I noticed the air intake hose (if that's what it's called; the big rubber tube coming from the air filter box, in the top left of the engine compartment) was torn. I pointed it out to the dealer and he said that I could just tape it up with duct tape, but it didn't really matter because the car was modified to run on LPG and the LPG modification has its own air intake.



Now, obviously the guy wanted to sell me the car so he could've told me anything I wanted to hear, or it could have been the truth - I have no way of knowing. All I know is that I'm not a fan of the duct tape method: that tube is right over the drive belt and if the tape came off due to heat or whatever, it'd get stuck in that belt, which is something I definitely don't want. Also, the car may run on LPG but it starts on regular gasoline (plus I might run out of LPG without an LPG station nearby, which would mean I'd have to continue on gasoline), so it'd be necessary then.

Now, I noticed that new tubes are about €30 on ebay, which isn't super expensive but not exactly pocket change either. Now I'm debating wether or not to replace it.

What do you guys think? Repair ASAP, or is it indeed not necessary due to the LPG system using a different intake?