Large variable turbo #s?

[WideOpenThrottl]

Do the large (11-14L) engines run variables? If so does anybody happen to know model numbers? Thanks,
Tim.

 

[Tate]

HE551VE and HE561VE come on the ISX's. The 551 is a 71 or 72mm turbo.

 

[WideOpenThrottl]

Thanks.