Sorry i'm away on leave currently, so lack of response....
the takeda sounds amazing when u go beyond 3K rpm, sounds like a v8, lovely sound.....to be honest gives me much more responsiveness too, after driving it than a standard is250 (courtesy car) the standard feels really slow! could be placebo affect who knows.....Peter who sold it to me said he got an increase in the dyno run too with it....
Also if u want to drive quitely and luxury style u can easily do so, but when u want some sound and fun can get best of both worlds....compliments the invidia mid pipes great :)
by the way comes with a heat shield too...hope that helps
if u can wait till Jan, i can demo it to u