Finally got a chance to mess with the car again. Pulled the o2 and went for a quick drive down the street. It seemed to be a little better but was really hard to tell. When I first started it up, it idled real rough. Almost sounded like it was misfiring. Nothing else is really sticking out so I'm gonna let the car cool off and pull all the plugs this time. Might as well check just in case, would hate to order a new cat and it ends up being a $5 repair.

Is the downpipe at zzp a decent option? Thinking close to stock as possible for now so a 2.5 downpipe with cat. Wondering since I keep seeing ppl suggest other places before zzp.