Then you deleted the resonator, not the cat converters. There are 4 O2 sensors installed (as factory designed), two per side, one before and one aft of the converters in the manifold downpipes. So unless you removed all O2 sensors, custom mapped and programmed a MegaSquirt computer control system to replace the OE PCM, and went to some other method of fuel trim management that didn't use exhaust gas oxygen levels, uh-huh. Post pics dude. Imagine how the people driving next to him must feel like, with the exhaust fumes going out the side like that, probably into their open drivers side windows. Nevermind that in many municipalities this would be an illegal vehicle modification. It kills me how many people think they are smarter than teams of engineers from all over the world.