Ok here is one of my first mods, grill blocking & I was thinking cheap, easy & NASCAR. So I went to Home Depot & got some black duct tape & had some old vinyl siding laying around. I cut the siding to the shape of the grill openings that I wanted to cover. Stuck on the tape to the siding & cut off the excess leaving about 3/8" overhang. Slaped it on, just like NASCAR & thats it. I blocked about 2/3 of the grill then drove it about 1/2 hr (city), temp gauge is where it always was. Check out the pic of this mod in my Garage area.