Last time I had windows tinted on a sedan it was $165. It cost me $50 to have the two front windows tinted to match the dark factory tinting of my truck. It will help. I have 20% all around in my truck (see sig) and had 35% on the last 2-3 hatchback and sedans I have had. 20% is not legal. Depends on your state. VA is 50% from driver forward. I had 50% on those front windows, my old roomie had 20% all around and got pulled over 3 times in 2 years for it.