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are you looking to go with coilovers which is your concern with disconnecting as in removing or concerned with adding lowering springs and disconnecting as in AVS not working anymore?
I lowered my 3GS with the F-Sports, not disconnect or no issue's for the time I had it. AVS was still working tested in Sport and Normal mode with no issue's. No bottoming out either.
Thanks for the information. The reason I'm asking is that I have a coilovers from my previous car which is IS350. I was going to use it but now I'm going to buy a drop springs instead.