Get the Zilla's, I have them on my Rhino and they are awesome! The only downfall is that the sidewall isn't too strong on them...I punctured on already but overall it's a really good tire!
Sorry that should have been $1500 installed. My mistake but it did make a huge difference. I figure about 10-15 hp more. So it's pretty good for the price! I got it done at RedLine Power Craft in Grande Prairie. They also ordered all the parts.
I just put in a high compression piston and a hot cam on my Rhino 700. Big difference! Way more power! I'd recommend to do it anyday. It cost me under $600 to get them and both installed. I'd definatly try it out.
Here's mine. I just put in a High Compression Piston and a Hot Cam. I also have a DynoJet Power Commander Chip still on order. Still brand new, Maiden mud ride is April 19th @ the Whitemud Quad Rally