I got a F7 and A crossfire for the wife

. I am wondering If there is any mods I can do that are cheap to the f7 to give that much more pulling power. I heard something with the pipe add some extra hp or am i off the wagon for thinking that. Im sure I heard it here some guys were talking abou doing something wiht there pipes to add hp.
Can anybody help me and should i get a diff air box also. Sled is efi.
Any help would be good. My first arctic cat and wow what was i thinking not getting one before. 300 miles on it only but can't wait for this year