perhaps i was a touch general in my commute to work, just checked in SPDA and it has the following.
appears you\'re right and its optioned. i cant see anything about blitzen specifically.
[table]
[tr]
[td]JDM Legacy RSK & GT-B MY99-00[/td][td]TY754VBAAA[/td][td]open[/td]
[/tr]
[tr]
[td]JDM Legacy RSK MY00[/td][td]TY754VBACA[/td][td]w/ LSD option[/td]
[/tr]
[tr]
[td]JDM Legacy RSK & GT-B MY01[/td][td]TY754VBBBA[/td][td]Open[/td]
[/tr]
[tr]
[td]JDM Legacy RSK & GT-B MY01[/td][td]TY754VBBCA[/td][td]Helical LSD[/td]
[/tr]
[/table]