I have a harmonic vibration at around 1000 to 1300 RPM under slight load or at cruise. Dealer said it was the sound pipe, but I had no change after disconnecting it. Car has 8000 mi, and the vibration has been getting more and more noticeable. I was thinking about changing to an aftermarket exhaust to try and eliminate the problem, but my fear is that might make it worse. Any thoughts will be appreciated. Thx

 

Vibration at a thousand RPM? You're having a vibration problem at idle??