My local service manager said that it would not void the warranty if you changed the exhaust, his opinion was that it would be after the engine, but, I do not have that in writing!I fear no mods being the considerate silver-tongued forum member I am. What I am really starting to realize, though, is that I owe it to myself to make the changes I want on my car and to Hell with anyone else's opinion. I will die before resale becomes an issue, too. Meanwhile, thnx to the forums and their members, I am getting a much better idea of what my options truly are. That other forum had a sound clip of a guy that totally removed his mufflers and went to just pipe, as I have done on a couple vehicles. It also led me to believe that as I get my car up, a bit, I may also be able to not only go to just pipe, but do it straight and not up and over the axle. That is how I had my 1966 427/425 and I love the look of just two pipes coming straight back and hanging low. It may have to wait until spring, but I am getting excited anticipating the departure of the four coffee cans and being excited about my car is something this old fart deserves. Removing the coffee cans is an obvious signal that no kid owns my car and no one suffering from today's "exhaust tip itis" is driving it. Thnx all for your info!!!!! Now, it would be nice for someone to tell me remving my npp and mufflers will not affect my warranty.