I have a 2012 2SS Convertible 45th edition - I just installed BBK Ceramic coated Long tube Headers with High Flow Cats - After about 5 starts I get the engine light coming on - It is code P0430 or P0420 which is a efficiency error. So I order the extender plugs from Speed Unlimited but when I went to install them I found that the convertible has a support plate that is in the way. So the extender plug will not work unless I remove the plate. I have a hand held programmer that allows me to remove the codes every few days but Their has to be a better option. Anyone have a suggestion?