Not that I've ever been aware of. My 89 460/propane has had duals with the factory manifolds since the first it's first muffler job. I don't know what to say man, my drivers side pipe is bent in between the flywheel cover and oil pan but I doubt that cost a whole lot. Who is the 'some old lady' and how did you get involved... if it's that gross of an injustice and they charged out the ying yang for something they didn't do then a call to the police is probably in order.