I'm trying to figure out what turbo I have... can anyone help?

Anyone recognize the compressor? I believe it's a T04B compressor housing... The inlet diameter is 2 3/4" where a stock s5 t2 HT-18 is 2 5/8"

I've attached a pic of the compressor with an ID tag from Alamo which states:

ALAMO
pn ht-19
mod ht-19
Ser 100506 77

I've called Alamo Industries (http://www.alamoturbochargers.com/home.html), but, all they could tell me was it was made/rebuilt on October 5, 2006.

I sure appreciate any help.

-Chris