About the road noise, it's not that bad, even with the stereo off. I don't notice any vibrations at all. i think i may when i put the locker in, but that another story. if you can't take our word for it, just take your carpet out, it's nopt hard at all. and you will realise the truth, and remember when adding the liner in that will kinda help with noise. i would recomed doing it, it easy to clean don't haveto worry about mud, water, and that smell, of wet dogs when ur carpaet does get wet. If you do decide to do it, try hoppo liner, yuou may get it from canadian tire for 50 bucks canadian. hope this helps pierre