I have an 82 GT, 302 (slight cam) headers, off road pipes, and Flowmaster 40 mufflars. I have a horrible hum at idle and between 1800- 2100 rpm.
Is there anything I can do to get rid of it?
I was told I might need more back pressure.
The car has all emission equipment removed.
Please help, I hate driving it because of the noise.