I bought a Spectre ram air kit ( air cleaner with two 4 inch snorkel inlets , two 4 inch ducts/hoses and inlets ) for my D150. I ran one duct to the factory intake duct work that exits under the turn signal rather than removing the battery and cutting another hole in the radiator support. On the other side I cut a 4 inch hole in the radiator support next to the radiator to draw cold air from behind the grill. My dilemma is : should I install a screen in front of the inlet? The grill is there to keep big objects out and I don`t drive it in the rain.