I bought a used intake and it didn't come with the hardware to mount the front tubes to the bumper. They seem pretty stable, is anyone else running without the tubes mounted? If no, any issues?

 

I'm running a different type of long tube intakes and I don't have mine bolted/mounted to anything. My pipes are very tightly fitted through the core support, holding all the pipes in place, and the filters don't move on mine. I think if yours is like mine, you'll be fine. I've been running mine for a year