Just wondering how important an aftermarket air filter is? and if it is really important, what are some good brands to go with and how easy is the install on an 07?

 

Helps throttle response, and is washable, which is key, cause the stock ones are not. I would put it on if you have a slip-on. You can feel is breathing better. Its a pain in the *** to instal, and the only one to go with is the BMC.

 

I have always heard that the best air filter for our sportbikes is the OEM one.

 

I agree. the only plus is that you can re-use some of the aftermarkets, they dont help breath that much better. I use OEM

 

K&N offers a oem replacement air filter. this is what i have. so i don have to replace it and just have to wash it out. i think it is worth it.

 

I had a K&N, but just switched back to an OEM one. I like it more with the oem filter in place. It just seems smoother overall, with less holes in the powerband. Two Brothers recomends the stock filter in an F4, and I agree.

 

I just installed a K&N on my 01' F4i and i'm liking it so far..

 

OEM... good solid Honda product