well, its the third time it has happened now, and im tired of seeing code P0420 (Catalyst System Efficiency Below Threshold (Bank 1))
im running magnaflow spun cats on my obx longtube setup, and am thinking about doing the gotts o2 mod, but also thinking of trying to tone the noise down a little bit. so my question for you guys, are the maggie 94106's quieter than the spun cats? and if not is there a high flow that is? and do they keep the code from comin up? if there is, i might just end up goin to them so i dont see the light anymore.

thanks in advance guys!
Adam M

 

dont think about doing the gotts 02 mod...DO IT!

i thought about doing it....then i finally did it and the light has been off since