Only coilover system I've seen is from KW.

http://www.kw-suspension.com/en/30_P...pe=all&zeile=1

I don't see a point in buying coilovers if you have rear air suspension as you would pay full price, but you would only be able to use the front coilover assembly.

IMO, just do front springs and rear links for a 1.2-1.5in drop and call it a day.

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