[fortrdb]

If you want reliability, then I would skip the K&N secondary filter. Stick with OEM.

 

[fortrdb]

why is that ?
Do you think it can cause any problems?
Is there any difference with K&N and GYTR secondary?

the stock filter is not restrict flow in that setup ?

I am not a fan of oiled filters for everyday use and reliability. I have taken them off everything I ever bought that had one installed. In the YXZ1000 secondary application, it is not oiled, so that eliminates the need for continued oiling. That is a critical filter for engine life. My personal preference is to use stock filters across the board.