Why are we talking about this?, this thread is very old (I just noticed now)It really depends on whcih ones you have. Most of them fit with a 3M adhesive tape, but if you have thethinner streamline ones they actually fit just inside the outer window track groove you should be able to tell when you get them or hold them against the car.
DEAD ON!!This is what I have: 2005 Dodge Magnum Weathertech Side Window Deflectors, Weathertech Vent Visors
They're the best IMO and I looked around before getting them, they fit inside the window channels perfectly, but I found out they fit better if you remove the rubber strips and fit the venvisors in there good.
Their instructions are useless, might be good for other cars but not the magnums.
Get them smoke, they look better than clear.