I was just doing some googling and noticed an old post on another forum about removing the stock "air reducers" in YJs to increase cold air intake. It was described on that forum as "the hourglass shaped piece of plastic" at the front of the box. Does removing this actually do anything? My guess would be that it doesn't, but does it hurt? Just wondering if I should go ahead and do this in conjunction with a tuneup I plan on doing over the weekend.