Sure! Great little vent fans. I have 2 in my rig.. well 2 of the Vortex II
jobs. It's 3 speed forward, and 2 speed (High/Medium) in reverse. They run a bit more.. I think I paid $75 each at the time, but they install the same.
They do run a bit loud, but it's a small sacrifice for not having to tear out and reinstall a whole new vent. Multi speed forward/reverse is a real plus. After being on the road it cools down the rig pretty quick flipping one on forward high and the other on reverse high.
The only con I would say is that when the fan is not running and you just have the vent open, airflow is more restrictive than a simple screen.
Here's a youtube
doing a comparison between the baby stock fan and the vortex.
Installation is pretty straight forward. The only thing that was kind of a pain was getting the crank connected, but no hardship.