So the 4-1 header everyone talking about is that more for low end power, & the 4-2-1 is for mid & top end power,correct? Now about that header for $900. Are you talking Type R or what? So would the WS have any kind of a deep tone. It don't have to be as loud as my Thermal. I just hope it will let me know I have an aftermarket exhaust when I'm driving.