Steve: No noise whatsoever. You put them on and forget them. I cut the stem off on the ones I installed as I was afraid they would be too high. I cut about 2" off the stem. Didn't change the performance of the vent.
If you can't play a sport....Be one.
Bill and Ann
Napanee, Ontario, Canada
2004 3670RL Big Sky
2003 GMC 2500HD Crew Cab 4x4 Short Bed
20K.Reece Hitch
Duramax/Allison
Prodigy Controller
