2000 Ford F150 stock intake mods?

I Have a 2000 Ford F150 its theV8 5.4L triton engine and it currently has the stock air intake on it. I just bought a k&n oem replacement filter for the higher air flow than the paper filter. Is there any mods i can make to the stock intake to improve air flow and just gain a few ponies or anything at all. I don't have $300 to spend on a aftermarket kit just yet. Any pointers would be very helpful guys.

This works well, maybe better than aftermarket