will taking out the center resonator and replacing the 2 cats with high flow round style cats with metallic subrate mess up the back pressure to the motor and clog the o2 sensors nd cause the engine light to come on? is this true? my friends and my brother are warning me that changing my exhaust will do this and cause engine problems? I have already purchased the cats and 2 mufflers..

will this hurt my vehicles performance (HP) & low end power? I want to keep the dual exhaust I want to just replace these for now. Will I need an x pipe and or downpipe to increase sound and performance?




these are the cats I am using



these are the mufflers I am using.

 

according to the chart, looks like 2.5 inch piping is best for an NA single exit exhaust. Woot!