I think the obvious answer is a custom uppipe using unequal length headers if by 'sound like a Subaru' you mean pre twin scroll wob wob. Up to you if that's worth the money or potential loss of performance.
Great chargers. The only bummer is the flaky switches which can fail. This happened to mine after about four years and it can no longer cycle programs. There are YT videos on repairing the problem which is evidently not at all uncommon.
I just saw you said aiming at Clubsport Basic. I had a quick look in the manual and didn't really notice any changes at that level. Probs missed something.
I have a helmet; the manual lists all the acceptable standards so you can't go wrong. Cheap cotton overalls cuffed with velcro. Oh, and an Alpine Star balaclava I won at Port Road one year. But you know all this stuff J; was this rhetorical?