I've been around for a while on this forum but I've been out riding after I got thing set up the way I wanted them.
I have the GMAN intakes and Bully fuel controller. Together, they made a huge difference in performance, but the GMAN intakes broke my "Salad Bowl" intake covers, and I've been running with things just wired together. K&N didn't have M90 filters two years ago. Now, K&N has M90 filters that fit in the stock assembly.
I was wondering if anyone has experience with the K&N filters. I don't want to give up a lot of performance, but I think most of the performance gains came from the Bully and not the intakes. Suzuki runs things really lean and just smoothing that out probably makes a big difference with or without more air.