Originally Posted by mSaLL150

I sealed my passenger side rear vent completely and half of the driver's side vent, and my fan never whistles as long as I dont crank it past 4 bars. It NEVER is past 4 bars for me, so its not a problem. The sound difference with them sealed like this is WELL worth it, reduced exhaust and tire noise big time. I didn't remove my vents, i just sealed them up. If i ever want to, I could remove the seal and it would be stock again. But that wont be happening.

As far as deadening, if you can afford it, go with Damplifier Pro from Secondskin. If you are on more of a budget, Raammat BXT from Raamaudio is also a quality product yet more affordable. I've got some of both in my truck.

Originally Posted by MTXThunder9500

what did you use to seal the vents? and do you have after shots of the finished product?

Originally Posted by mSaLL150

First I taped Saran Wrap over it to keep the stickiness off it in case i ever want to unseal them. Then 2 layers of Duct Tape followed by 2-3 layers of deadener.

Yes its cheap and somewhat unprofessional, but its damn effective.

Here's the passenger side vent covered up, I only did half of the driver's side one to allow some air passage so shutting the doors isn't a workout and so the AC isn't stressed.

Originally Posted by Low_e_Red

I would only use Dynamat Extreme or Damplifier/Damp Pro.