Following Jays positive comments on the ECU upgrade, i decided to go for it too, as my 2009 Roadster has the same engine as his. So last week when in UK for a short vacation wt my 16 yr old son, I went for it, as well as for an upgrade of the airfilter.
When we returned from the test drive, we both had a big smile on my face.
Others have said before, the car feels liberated, much more eager to rev, more responsive to my right foot and due to the airfilter there is also a nice hissing sound when accellerating. The new filter has replaced the plastic box. So looks have improved too.
Williams do a great job. Thanks to this forum, for highlighting this.
