I didnt come up with much on the 6X6 and I dont know much about Polaris but I have a Curtis Cad system on my Rhino and I noticed they are now making them for polaris. Ill send the link to the site and you can drop them an Email, Im sure someone there will know if it will fit your machine.
If it will work for you I would have to say it is the way to go. Ill also give you a link to some pictures of my cab so you can get a better look at the system they use.
http://curtisindustries.net/PolarisRanger/
http://www.sidexsideforum.com/viewtopic.php?t=1426
hope this is some help

Nice.
Thanks for the feed back, A lifetime guarantee would be hard to beat.
This is something Im very interested in once the funds $ are available. 

Id give em $20 for it.

My cousin is a Yamaha dealer, one of her sales men said that they were not going to come out with any new Rhinos until after newyears. She didnt not know what they were comeing out with and has heard nothing else.
Yamaha has something brewing. :twisted:  :twisted:

Personaly, Im happy with my Rhino dont think there is much I would change.

http://www.aquahotoffroad.com/Pages/offroadheater.htm

Id try this one. I have an electric one for my Rhino but would like to change over to a liquid core like the one in the link above.

Anyone try White Brothers or Super Trapp exhaust on a sidexside, I had good luck with their ATV pipes a few years ago.
Some models of the Super Trapps are easly tuned as well, just add or remove disks on the tip, That way if you go someplace
with noise restrictions you can change your pipe noise by adding disks.
               

I hate to say it but this is a loosing battle.
Alot of Maine use to be open to ATVs now you are lucky if you can ride on your own land with out someone bitching. It is the same for jetskis most lakes are shutting down.
This is a sport too many people hate and unfortunatley nature people (treehuggers) and landowners always win. Its sad to think that the way we choose to spend our free time is slowly being taken away because other people dont think its right while their freedom to enjoy the outdoors and what they love goes untouched. Its just another sign  that this country is loosing focus on what it was started for. FREEDOM

I am not saying you should lay down and not fight to keep your trails open (I say go in guns blazing, fists up and bring them hell) I am just saying be ready for more trails to shut down because your freedom to enjoy the outdoors the way you choose is hated and looked down on by more people who get what they want.