have seen pics ( I think acela?) that runs them all up into am open ends PVC tube. (between cab and bed/box?) For all I know the ends are then covered with screen material to keep out bugs.. which happens a lot actually (mud hut homes in the vent holes)Can you provide a picture(s) of how and where you relocated into the air filter? Any problems or issue since relocating? It seems like it'd be worthing doing. I'm in the same boat as the original poster.... a nice even coat of oil on everything around the rear axle. It also happened on a very cold day so I'm guessing my lines are obstructed/clogged. Thanks!