im buying a 2009 rzr. and i was wondering what are some of the better mods to do to it. im going to be doing alot of trail/snow/woods/light mud bashing.

whats a good clutch, does it affect the top end. (i know it does on our brte force 750)

whats a good exhaust, intake, and fuel controller i could use.

im only putting on 26" tires. is there no point of doing the spacer remover, if i put a clutch in it. wont the clutch slow it down. but doesnt the spacer give around 5 mph more. or does it you different springs and everything.

Best bang for your buck is a good clutch kit. Take into consideration the other upgrades you plan on doing and get a clutch that will work with those. The other upgrades wont be able to show their full potential if your clutch isn't set up right.
I'm not sure if I want to get into a debate over the spacer removal....I'll just say I dont believe it's worth doing.
At best, you will only see a top speed increase of 3 - 5 mph...but nothing else.

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if you buy a clutch kit make sure it has adjustable weights so you can adjust it as you get more performance mods.