light load surge finally nailed

[Volvi]

I had the air box mod for some years then changed back to OEM config.

Reasons: The mod supposedly adds 2 HP however its effects are only on top speeds, so if you were looking for a record top speed ok otherwise waste of time. The other reason its not an asset is when tuning the ECU for mapping you cant get accurate readings and thereby cant get the best tune out of it - at least that was what I have been told.

PS. This is a TRE topic.