I'm overdue for a tuneup and want to replace my air filter.
should I go K&N or OEM? whats the difference??
I've heard people argue about extra hp for both filters. Does it make a difference??
Also thinking about dropping one gear down on my front sprocket for more low-end umph. any comments???
(if i do that will i notice a big difference,a nd do i need to change the chain and rear sprocket too??).