i think its gonna be more work taking them off then its worth... someone else in here has done it and if i remember correctly, the vents were not held on by just 3M tape, but had a nut holding them on... ill look for the thread for u though
as i mentioned earlier they do leave holes in your fender once they are removed. sorry abt the luck. IMO id just leave them on there, or if u decide to replace them, find a way to hide the holes, such as better looking vents, some kind of decal design, or something to that effect
I removed mine but it was a pain and I couldn't ditch them altogether because as mentioned above you are going to be left with 5 holes in your fender so I decided to color match them and put them back on. I say it was a pain because the vents are held on by an adhesive gasket as well as a few clips that clip into the holes in the fender. If you're not careful it's going to be very easy to do damage.