The factory had a 3mm hose connected to the right front corner of the airbox. It had a very slight affect on fuel pressure and most ST/RS bikes no longer have anything connected at all.
I concur on the plastic fuel line fittings. Replacement is pretty much mandatory. IF you're in the US there's a recall and you can still get it done by any Triumph dealership as it was a NHTSA Mandatory Recall. Call your local Triumph dealer, give the service dept. the last six of your VIN and they'll look it up for you.
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