I do, yes. It has slightly more low down torque, not much but you can definitely tell it's there and it's nice. The new exhaust set up is lovely too. Nice and quiet-ish when cruising, gives off a nice burble anywhere below 3500.
The real difference is when you go above that 3500 mark. The cams kick in and the exhaust just screams. It pulls pretty quickly to 7000
Couldnt comment on how the 155 compares to the 140 as I went straight to the MR kit. Car was rolling roaded with the J1 before it was fitted and it produced 147bhp. I take that with a pretty big pinch of salt, but it was definitely quite a bit more than the book figure of 132bhp. Fuel consumption is a bit higher but that's to be expected but it will still do about 35-40ish when driven with your eco boots on
I may change the overlays
the whites on the wheels are getting a bit manky!