Hello Crhis,
KW does definitely not list Variante 2 for 986 cars. I don't know why dealers sell this for the 986.
Helper springs (Vorspannfedern) are in general only used to get a preload on the axle. Helper springs are completey compressed if the car stand on his wheels.
Check the numbers on springs and dampeners and ask KW of USA if these are the right ones.
http://www.kwsuspensions.com
Regards, Markus