My car is vibrating pretty bad around 2000 RPM. Below and above 2000 RPM is smooth. It does it driving, in P and in N. I just had Pace Setter long tubes put on. The engine runs good but vibrates at 2K. I am sure the exhaust is not hitting anywhere. I think it may be the Torque Converter but am not sure. I have an S10 converter. Any ideas? Please let me know. I will post in the Drivetrain area too. Thank you