are they stick strongly on car body or on outer window frame? are they noisy?
1950045
They stick very well if you clean the mounting surface very good with alcohol. They actually cut down wind noise.
1201055
I don't notice any noise and they have a very aerodynamic blade design. I leave them on all the time and don't do a lot of highway driving. I don't worry about MPG and have never checked. They are easy to install and remove if you want to save on gas when they are not needed.
1291460
They tape to the outside. Atleast the ones that I got. They stay in good too my girlfriend drives pretty quick and there's been no problem at all
1531416
J.They are applied on the exterior with just the 3M tape. They tuck in behind trim on side rear view mirrors. I have not had any problems at highway speeds since installing them. I also used a very small bead of clear silicone on the leading edges, to help with wind sheer. They do not go inside the channels, but surface mount. Hope this helps.T. Gore
1104179
They are not clings they have the sticky backing. Mine has been on my car for a year now.
300066
Yeah they make some noise unless you tie down the loose ends of the straps. I have had some problems w them coming a bit loose when I'm driving at high speeds so watch out
982331
Yes ours have stayed on about 1 yr. now in both of our cars, just make sure you put the correct side against the window
109154
This one is pretty quiet. It will hummm but not vibrate. If you are hearing a vibration is is more than likely coming from the unit vibrating on an aluminum or other rigid window. I initially had this issue, then put some supports on the back of the unit so it wouldn't vibrate on the window itself.
249645
They do not add to the wind noise and if you drive with the Windows down thirty help with the noise ...Hope that helps...
217764
FYI I returned because they stuck on the door frame itself, solid, but I did not want it on the painted surface. I bought ones that go in the window track and am very happy with them
2061711
Mount under the hood if possible to trim down on noise. My is mounted underneath on frame and I haven't had no problems with it
1201053
No noticeable noise and if there was a mileage drop it was minuscule. Overall I am happy with them. FYI if you are planning on throwing a canoe or kayak on top and plan to anchor in front and behind the car, there are no attachments anywhere the rear bumper. Subaru dropped the ball on that one.
896744
I do have these on my top of case exhaust. They do make noise at a higher rpm (Not a bother.) I control this with a fan controller. When I need them at higher speed, they are turned up. I turn them down and they are quiet. I have had them for 2 years now and they still work well.
914617
They don't - they are meant to attach to the side windows, not your windshield. You'll want something different for the windshield, if I am understanding your question correctly.
229721
On my VW fan, I installed them on the inside edge of the front wheel well. this allows me to garage my van by listening to the feelers if they come in contact with anything on the side.
387121
No, they are more sophisticated. There are tiny metal clips, plus a two-sided strip that glues on (based on foam). So super nice, super tidy and super professional. I have replaced them once, so nothing is left behind or damages the car.
421796
they are fairly loud. they drown out a lot of the engine noise on my 62 falcon if i'm standing next to it while running. i have 2 installed, louder than an average electric fan. i also have mine mounted in front as pusher fans, that may make a big difference