Tri z air filter

[Jcormode]

Hi, I've always ran standard air filter and box but I'm after letting my baby breath a bit more, how good are the k&n filters and can I leave lid off with them or do I need a Pre charger etc.
I'm sure you guys can spread some light on it for me

[Bryan Raffa]

I run pre chargers .. keeps em clean... and you can just clean the pre charger most of the time.. if it still a little fat.. ya take the lid off..