Just a thought. I bought the Twin Air filter kit for $100. with the custom cage and filter for my 02 YZ426. As I was installing it I got to thinking. Maybe I could have just bought the filter, and cut the metal screen out of the stock plastic filter cage? Has any one done that? A little late for me now but maybe it will save someone else 70 bills. Besides if it will work, I could mod the plastic cage and have a backup.