Hi man, it all depends on how much money you want to spend on power upgrades and how radical you want to go oh and also your riding style. Normally people go with a exhaust, K&N air filter, re-jetting kit for the exhaust, clutch kits. If you want more info on any good products email me at
chris77416@hotmail.com. 07 800 sportsman, head porting, high perf. cam, advanced timing key, bored throttle body, K&N air filter, power commander usb, full high velocity exhaust, polaris team clutches, adjustable primary clutch weights, high perf. helix and spring in secondary clutch, 30" mud lites, heavy duty front and rear suspension springs, front and rear brush guards and with the suspension mods came 15" of ground clearance. Happy Trails man.