Thanks for the reply. I researched and read all kinds of stuff on airbox mods... from all the after market stuff to people moding the stock and adding their own filter.... like I said, I'm no Honda engineer. Before I go cutting stuff out of the airbox, I would like to know what it is. I've seen the same question asked in a forum but it was not answered. I don't go to the track.. I'm not looking for extra cheap hp. My goal is purely for aesthetics. I currently have the Sato carbon banzai hi mounts, PC3r ,ohlins all around, yoyodyne slipper and other things complements of Kyle Racing. So you see I have no problem spending cash, I just was wondering is all. I love the signature sound of the intake. I've read during researching that modding the airbox will increase the sound. What I'm worried about mainly is the square doohickey and the expansion looking area in the box. I get that those things a gone when using an aftermarket box, but they are there for a reason and I was curious if anyone knew. Ty!