I've got a polaris magnum 325 4x4. So far it's stock. I'm looking for any suggestions on how to get it faster and/or more powerful? I don't have a speedometer, so I'm not sure of it's actual top speed, but It's not much lol.

 

Aaen Muffler, Dyno Jet Kit and a K&N filter will help as far a minor mods. Major mods would be higher compression piston head porting and a Aaen Performance cam. Do all that and you just may get that thing rolling pretty good. Don't worry about a clutch kit for the Magnum as it is set up pretty good already.