OK, I found that the turbine has 3 different numbers:
Inducer: Holset HX40W
Mid part: Holset HX35
Exducer: 3523066 16 129 - looks like a 16cm housing, but no idea what 129 means..
Nevertheless Typical HX40 has 18cm housing, which might mean that it will spool up a bit faster..Гугл выдал по...