Ok so the other day a friend of mine said my truck sounded like it had a small exhaust leak. A car drove under neath my truck so I don't doubt there could be some damage to it. When I start to accelerate the tone drops and is very deep and it drones on until I hit the gas more. When I hit the gas it the sound "clears" but sounds like it wants to backfire. Never does. If I'm on the highway and I'm doing 70/75 it makes that same noise. I took a video of the sound when I revved it up maybe you can kinda hear what I'm talking about. I don't see any soot marks on the pipe and theres no clicking from the manifold. But something is off. If you guys could give me a little input that'd be great.
https://www.youtube.com/watch?v=TRAnwLpYEPs&feature=youtube_gdata_player
https://www.youtube.com/watch?v=TRAnwLpYEPs&feature=youtube_gdata_player
