Originally posted by TimeRacer
Anyone that tells you Ground Control isn't a good "coilover" system doesn't know what they're talking about. If you get a full GC system with Koni's or Advanced Design shocks you have the same, if not better shock/spring combo than if you bought the Tein's. PLUS you don't have to worry about rust as you do with the Tein's due to their crap surface coat.
the bottom line is that GC's aren't mated to whatever shock you combine them with, so they might work well, but they'll never ride as well as a full coilover setup. the difference is subtle but real. it probably matters more when daily driving.
also tein's updated SS and Flex setups are teflon coated for rust resistance now.
btw there is no tein HA flex, there's the HA which is discontinued as of recently, and not compatible with the EDFC; and the flex which is supposed to replace it, which is compat with the edfc.