I think VTEC is at a low 4500 RPM, but all it does is change it from 3 valve operation to 4 valve. No high lift cam here....... You could always hook up a relay to the VTEC solenoid so that your headunit plays an mp3 of this (http://www.youtube.com/watch?v=QXDNxkUiUws) when you pass 4500 RPM.