Yep. like he says, I got about 90% of the heat, dust, and noise to go away by sealing off from the rear soft window curtain into and under the front seats on my U 800. Used foil lined bubble wrap insulation from home depot and extra foil tape in high heat areas, also lined the inside of the plastics around the air box. The noise control benefits alone were worth it. Behind and under the seats just needs to be sealed up.