Been investigating various options on this.
Firstly I believe the 2006 STi sumps are of the narrower design like the spec c to help alleviate surge.
Secondly I am looking to modify the std sump to improve the baffling. I have pictures ad spec of the group N arrangement and will be seeing how easy it is to implement this into the design of my sump.
Anyone any thoughts on the group N design and whether it works ?
ps - I have never seen oil surge as yet on my car at any track.