sold a 2005 Mustang GT to a friend with 65K miles. I told him the torque curve of the engine goes down past the stock rev limiter but he still went ahead and changed the neutral rev limit to 7300 RPMs and drive rev limit to 7375 RPMs with the SCT tunner I sold with it. It's not my problem anymore but it's sad to see my precious S197 I took such good care of and I hate to see it get beat on like this. How long would you expect the engine to last being constantly at WOT and hitting those kind of RPMs?