whats a stage 2 intercooler??? i only know it as short stack or full size

 

ZZ performance has both the short stack and full size.

ZZPerformance - Intercooler #ZZ-FSIC-38

(the full size intercooler has a S2 on it. As far as I know the ZZ full sized is the same as the stage 2)

w-body has a what they call a stage 2: Intercooling - W Body Store

Thrasher also handles one: Intercooler for 3800 Eaton M90 - Thrasher Engineered Performance