I saw the same post from 2005(!!) but unfortunately it turned into a medical discussion for sore backs (which I can relate to!) without any resolution! I'm looking at a Pantera that I may buy that has the chirp at idle and above rpms. If you put your foot over the outboard tailpipe on the right muffler - sound goes away. I assume something has opened up to create this chirp?
Anyone else have this problem before on the Ansa muffler?? Thanks!
I hope to be a Pantera owner soon (perhaps next week!)