i've had a THS manifold fitted for 8-9months now, fitting was a pain (had to modify a spanner slightly to get the bottom row of nuts on), however it's been great since, i'm only on standard turbo but there deffinetly seems to be a bit more poke, but it also seems more progressive, doesn't appear to of cracked in anyway, and it does looka substancial lump, so i can't really see it cracking (certaintly no easier than the standard one... which was cracked on mine..)
Std vs THS...