mk216v
Der Chef der Fahrzeuge
They don't have a K4 for the G63 yet. I have the Kleemann/HJS cat down pipes, turbo bridge pipes, and ECU tune. It would probably be considered their K3 package even though it isn't listed on the Kleemann website yet. It makes about 650 whp which is about all the diffs can handle according to Kleemann.
Wait, no cams or t-body?