The vent/rollover valve is located on the top plate that you can just barely see in the top of the picture. Normally I just put a small filter on that fitting and all is well. But a few weeks ago we where at a World of Outlaw show and those guys all had a hose off the vent run down to the bottom of the chassis. Well monkey see monkey do,my partner ran a hose down the side of the chassis and that is the results.