Just a caution. When working with the fluid dynamics of pneumatics (air flow), do not reduce the size of either the input or output tubes on the belt cooler. Because you are increasing the friction on the column of air by adding additional length to the hose you should increase the hose size by at least 3/8 of an inch over the ID on the OEM fittings.
Take a look at the venting system on the new Teryx, and you will see how they upped the vent sizes to reduce belt heating problems. The same thing applies here, only ours are faster and a lot tougher on the belts! I know the RZR is faster, I kissed a sneaky tree racing against my kid's Teryx. Not to worry, I really tromped him right out of the hole and clear through a quarter mile before the stealth tree snuck out and attacked my front fender! Then he had the nerve to complain about parts of RZR fender and tree bark sailing by as he tried to catch me.
Back to the issue. If you have a laser thermometer and know some Teryx victim run the RZR and the Teryx hard for about an hour and shoot the case temps on the back side of the belt. The RZR runs nearly 120 degrees hotter. Open up those vents, and the RZR will still run about 70 degrees hotter simply because the Teryx has a bigger fan on the back of the primary and can more more air.
I figure this air flow issue will become critical come summer when the air temps are in the 90's and 100's instead of the 30's.