I used to get it on my R56
MCS as well and I love it, sounds like my own little race car (only not too loud).
Now that I have the
JCW kit fitted it is even more noticeable, sounds great and surprised me the first time it happened with the new exhaust. If you like the sound, get the
JCW kit, the sound alone is worth the money.
I love the MINI sound, best 4 cyl turbo I have ever heard (best bit is we own one).