Dunno if been suggested..
But how about another predator or some powerup makes u Completely inviseble. No jetsound and no jetflames??

Or a powerup that makes ur jetboots get unlimited fuels in 10 secs???

There is a topic in the other suggestions forum.
This powerup would be over doing it... There should be like the muzzle flash, only.

no it's good the way it is...
it'll require a bit of skillz from you to sneak around while invisible...

You have a good idea in mind but some maps have a low fuel count for a reason...

Even if you took away the jet sounds and graphics, you'd still get shot up running and flying around--the more you move in pred mode, the easier it is to see you.