Gutting the main cat is a no-no. I have a msds-y. Found a few things to correct and will dyno again soon...Like my KKM. With the 65mm tb and 75mm maf it is starting to implode. I took it off and drove down the street and my car went so lean it barely ran. And yes I just cleaned it. I'm going to a S&B big mouth I think and most likely 6inches. Feel fairly confident I will break 180 next time.
