open the box...
drill holes in the oem box or buy a open box.
there are 'how to' topics on the forum for the open airbox mod.
I bought the Jardine. I read all about how they are not much better then stock if at all. I just wanted it to sound good, so now I have a Buell xb12s thats sounds incredible and 12 lbs lighter. I did notice the loss in the butterfly valve when taking off. But the mid seems to hit a little harder. I think it stayed the same over all, but sounds like a harley instead of a 73 VW Beetle.