I am definitely no help with Garrett Turbos. I have been on their page to try and understand their numbering and lettering for turbos and I'm still lost on it. But allow me to introduce more abstract and most likely pointless ideas. Element Tuning has been doing great with some of the Time Attack events.
Its basically a 20g, but the have pulled some great results out of their STi.
http://elementtuning.com/Turbocharge...bochargers.htm
Its probably just a Garrett Turbo with an Element Tuning sticker on it and marked up $300 bucks, but I'm trying new ideas
Just wondering, but would you benefit from some sort of Meth injection or do you already have it?