I know they can be done, 986/996 guys have done so already. My guess is that you'd have to go to standalone management and/or find someone to do alpha-n tuning. Again, I'm sure it can and has been done, but remember, when tuning alpha-n it is essentially a generic or default tune for throttle position and fuel demand and eliminates an actual measurement of the air mass or volume. In short, you lose stock drivability, cold start warm up, etc in place for a little more power and a look. And that doesn't even begin to touch the surface on things like camshaft optimization, etc... BUT, you guys know me and I am all about stock tune, drivability, and end user simplicity. ITBs eliminate all of that.