So I installed the American muscle x pipe without cats...and 1) no engine light? Thought it comes on when 02 sensors bank 1&2 pick up same gases. 2) there’s a leak on the driver side where the mid pipe meets the manifold and would that cause the fuel air mixture to be thrown off causing misfires?. I’ve replaced COP, spark plug, all vacuum lines, EGR system, Intake manifold, air filter, fuel injectors, fuel filter. Did Compressions and they read normal 120-180 averaging around 150.