I can't imagine there is much potential left that still allows for the car to be reliable on the track. Try explaining to your SA that your turbo bearings blew apart and its not the tune's fault. Cooling will be the #1 issue. I do agree though that COBB would be the way I would go.
I don't see how anything close to 500 HP could be reliable at full tilt with stock hardware. You're just fooling yourself.
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