yeah those silicone lines are garbage. not to mention ugly with the color of them. A lot of problems could arise with bad vacuum lines. They control your map sensor, boost controller, fuel pressure regulator etc. basically vacuum lines are very important and you dont want them to fall off or be collapsed. Ive had them come off before and my car tried to boost the max the turbo would go thankfully my tuner set up a boost cut.

 

i just use regular old vacuum line...if they are near heat wrap them in heat tape. problem solved.