Today made the X pipe mod. Total cost was 95 euros, and for this price I canīt find a better mod
Sound is slightly different, with a deep growl at idle and while accelarating you can hear a ponouced bass sound, I just love it. When I got home, stayed inside the garage playing with accelarator

the sound is great, I donīt know why BMW does not make it like that from standart.
The X pipe was made by some exhaust pro guys, fit and finish look fine.Hereīs some before and after pics.
After
This is a pic of comun install you guys make on the states.
J.Seven