Anyone know if KN air filter will help with performance on 07 500 efi? Or is it just a waste of money. I realize that it won't be a huge gain. Are the efi's set on there air/fuel mixture so even if you have more flow it still will not help performance? Thank's Hoov

 

Simple, EFI will match the right amount of fuel for the air quantity and conditions. The more air, the more fuel the more Power.... GRRR

 

notmydayjob -

Why hasn't Polaris continue
with the 600 class? And do you
like yours? Would you recommend
others to buy one same year or
older?

I am also assuming that my 450's
can get a KN air filter? What about
the oil filters, any gain there?

R'