The exhaust is being retrofitted as I speak. However, right now, it seems that utilizing the remote control to switch between Cruise and Sport mode isn't changing anything. It's visually noticeable that the Capristo control box is switching between the 2 modes though, as I have not covered up the boot panel yet so as to monitor it. Problem is, the valves are not opening as there's no discernible difference when switching between the 2 at idle. Am wondering if it's any problems with the actuator valve (not too sure if it's called that) or some other vacuum valve since when it's physically manipulated at idle, it can be audibly ascertained that the valves have opened. Wondering if anyone has come across similar teething problems?