[kobayashimaru]

Hey all!
I'm trying to coax a few more MPGs out of my 2011 Hyundai Santa Fe V6. I know that reducing exhaust back pressure can improve performance, but does it have an effect on economy? My car is set up for California emissions, though since I live in Jersey I don't need to maintain that. Part of the Cali package is a secondary catalytic converter after the two main manifold ones. All of the O2 sensors are upstream of it, so nothing monitors what is coming out of it. Do you think removing it, along with the resonator, would boost my mileage at all?