FE2 = V6 10-15
FE3 = 10-11 SS coupe and 10-15 SS convertibles
FE4 = 12-15 SS coupe
FE5 = ZL1
FE6 = 1LE
FEA = Z28
V6 models require a rear brake upgrade for the FE4+ rear sway bar upgrade.
10-11 SS models require 2012+ rear lower control arms and rear GM or DSE endlinks for the FE4 upgrade.
ALL 2012+ models have the updated rear lower control arms to accommodate for FE4+ sway bars
12-15 Convertibles can upgrade to FE4+ with an FE4+ style rear bar and rear GM or DSE endlinks. (10-11 will require the rear lower control arms as well)
Hope this clears a few things up. As always; I'm always happy to answer questions. Feel free to call PM or email me anytime!
Best regards,
Tyler
888-308-6007
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