More to topic . . .
This is one of those things that only very few have tried.
Why?
They are paying off their box and are putting money to more "immediate" issues and desires, namely interior parts, grills, wheels, and the like. Also, many refrain from engine mods till after the warranty expires. Most xB2s are well within warranty parameters. Throttle body alterations, and the discussions of impact, will come in time. On this particular mod, I'd look into what folks say about it who drive tCs (they have been around much longer and have many doing engine mods AFTER the warranty expired). We have the same engine as those, so many engine mods are very similar (differ more in intake and exhaust routing b/c engine bay/body shape) to xB2s.
Edit- Example:
http://www.yoursciontc.com/forums/index.php?showtopic=20112
