road noise
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3rd Gear
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road noise
I am a first time owner of an '01 C5 coupe, 6 spd, mag red, love the car, only thing I have found wrong is on a rough surface road or expansion joint road it has lots of road noise. Any good safe ideas to cut doun on noise??? Yeates 1
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If you want run flats the Michelin Pilot Sport AS ZPs are a good improvement. If you can live without runflats there are a number of cheaper and quieter options out there.
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Install some insulation under the carpet and get non-runflat tires.
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You can search the threads on this topic. There has been alot of discussion on it and what can be done. One of the quickest, easiest and cheapest things you can do is by some fiberglass insulation (R-13) and fill up the three storage compartments with it. It will cut the noise volume down by at about half. I bought a roll at Home Depot for under $ 11.00 and made 3 layers per compartment. Huge difference.
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You can search the threads on this topic. There has been alot of discussion on it and what can be done. One of the quickest, easiest and cheapest things you can do is by some fiberglass insulation (R-13) and fill up the three storage compartments with it. It will cut the noise volume down by at about half. I bought a roll at Home Depot for under $ 11.00 and made 3 layers per compartment. Huge difference.
Yep, I did the same thing and the noise reduction is amazing. A lot of the noise you are hearing is "resonance" that is created in those rear storage compartments. The fiberglass insulation has quite a dampening affect. Not only does it diminish road noise, it also reduces exhaust drone. Good luck! 
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If you do a search there are a lot of threads on insulating the back of the car. Many do the entire rear cargo area and also under the seats and the console area. Supposed to make a huge difference, the only time it bothers me is on the interstate.