I just bought an 03 cobra (sonic blue) and it already came with an Bassani o/r x-pipe and flowmaster catback. It also came with a densecharger. I just ordered the pro 5.0 shifter. What should I do next? I was thinking about changing the stock thermostat and putting in a 180. Should I change the plugs as well? I don't know too much about these supercharger motors. I know I can change the pulley but not sure which one to get. Thanks for the help.