for what it's worth, my 2005 TDI 2.0L 103kw (yes, I know it doesnt say "GT") has hex heads and not torx - 5mm for EGR (3), 6mm for inlet pipe to EGR (2) and manifold are also 6mm hex. There arent any torx to be seen (yet...or "I hope") on EGR assembly
Heads have not been mangled in anyway, and are definately 5mm and 6mm - allen keys fit nicely, and bolts can be turned/loosened by hand.
hope this helps
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