Switching to non-OEM air filters (like k&N or simota) will benefit your ride's acceleration and fuel consumption, although sometimes, with the better acceleration, you may forget to let go of the gas, thereby not making the fuel economy much better than stock. hehehe.

that (intake), together with headers, slightly bigger pipes, and a freeflow muffler that doesn't announce to all and sundry that your arriving should actually help your engine breathe better.

btw, anyone know what local shop sells the apex intakes? tnx.