Yes the Syvecs works very well; its a Life Racing product.
I hope I can deploy my S6 soon in my Subie to get some seat time. When I tell my friends in the middle east what I want to do with the Syvecs as a dealer, next question I heard, Ed you to tune our garage of GTR's lol
You all should look into it. The possibilities are great.
For further reading, check the link out -
http://www.syvecs.co.uk/products/engine ... stem/sgtr/