Machine:
Polaris RZR 2008
Date of manufacture 11-2007

Cost Delivered $450.99

What's in the box;
Airbox canister
Small UNI filter (for the crankcase)
Mounting Bracket (Transmission)
Canister mounting band
Assorted bolts & nuts for the two mounting brackets.
And the air filter.

What's not in the box;
Instructions. But if you need instructions on how to install something this simple you
shouldn't be turning your own wrenches anyways.

Out of the box impressions;
Nice quality, nice welds on the aluminum.
I think there are too many air intake cuts on the canister for a 800-cc engine.
Nice size lip on the intake track that mates with the OEM rubber throttle body coupler.

Installation experience;
This very straight forward but I did run into a few minor issues.
Issues;
1: The bolt that hold the ignition coils to the frame of the machine was rubbing/pushing on the air canister and had to be cut down.
2: The support mount, that mounts to the transmission that supports the canister if mounted into the lower two holes on the OEM transmission mount placed the canister to far behind the frame rail and therefor unable to remove the canister cap to access the air filter. So I used the upper two holes, or the middle and the upper. This allows more access to remove the canister cover but it is still tight and semi difficult to remove. The supporting bracket comes with two bolts but if the 2nd one is installed when using the upper holes on the transmission mount as I did it will interfere with the shift linkage. (I only used one bolt and "lock-tited")

Notes:
If the supporting mount was about 1" higher then I think this would fix the issue.

Overall thoughts, ideas, and impression;
If your a submariner then this is not the airbox for you.
I think the single most improvement would be eliminating the intake "cuts" that go half way round the canister and replacing with a 2" or 3" intake tube nipple so you could run a hose down to the canister from a higher cleaner air source. (I may just weld mine up this way after I ride this weekend, but the area where I would like to install a nipple is too close to the OEM exhaust pipe.)
The air canister does work with the OEM suspension and wheels and tires, I really looks like it would rub but it doesn't I tested this by removing the shock and lifting the wheel to the highest point to simulate the suspension arch. I have new wheels and tires coming this week so I'll test again when I install them.
The air filter itself is from Donaldson and is for heavy machinery so I would assume if it can filter out the dust and dirt from a construction site and protect 100k machines it should do a great job protecting a 800-cc engine.
Might try getting an outerwares that I can use on the outside of the air canister just to help filter the air before it enters the canister.

Cost:
Is it worth $450? if it protects my engine, then to me yes it is.
What do I feel would have been a better price point $350.00.
$450 would be Ok it there was a 2-3 inch nipple welded on for a remote air intake.