Wow, where do you get the Saleen speedo?
Mine is calibrated exactly to what it was stock. I marked the needle and the pin so I would get it back in the exact same spot. When you plug the instrument cluster back in for the first time and turn the ignition on, it sweeps all the gauges to max. It sweeps the speedo to 160mph exactly, just like it did before I started. I then checked it against two stock cars yesterday, one at 40mph and one at 55mph. So, however off the stock speed is, is what I have. It just goes higher now. I doubt it is accurate up at the top part though.