I have an 89 lx mustang. A couple months ago I was going to buy a new exhaust for it headers back. I started to take apart the exhaust taking off both tailpipes. Because of a money issue I wasn't able to get a new exhaust for it. So now whenever I drive it i have to drive it with no tailpipes(I don't drive it often). I always drive it with the windows down but because it's winter now that's become an issue. Do you guys think its safe to drive the car with the windows up?