Hi Rik
I have a 2012 car which was prone to pinking at higher revs under load. This was a commonly known issue and sometime later on a new ECU map was made available which i believe changed the ignition advance at those conditions.
I was sent the file by dealer and i self installed using the Protune Software. Only takes a few minutes to upload to ECU
Pinking has gone away since then.
My exhaust has not (yet) had the bafflectomy but i do have the S&S stealth air intake kit which in itself was a positive move.
If you use Protune you can see what file is installed. Under comments i think?
thought two..... have you had the o2 sensors checked? as there have been some requiring replacement on older vehicles and could lead to "strangulation" and increased fuel usage
nigel
