It's a discontinued Lian Li case, here's a link.
The UT 60 has 11 fins per inch, the GT Stealth has 30......... So....
He either needs a different radiator, or loud fans. The GTS is just ridiculous as far as air restriction.
I'm fairly certain Alphacool doesn't make a UT 30, are you sure you didn't mean the ST 30? They're slightly different, the ST 30 has a higher fin density, it's around 15FPI if I remember correctly.