Well after troubleshooting every little thing trying to figure out why my gas mileage blows and my idle is so rough, and the performance has been lacking a bit too, the car finally threw a code a couple days ago for a bad catalyst. All these things are symptoms of a clogged cat right? Maybe the thing will finally run normal again. I'm thinking about picking up the magnaflow high-flow cat from ZZP, cuz it's actually cheaper than the oem replacement from rockauto, and a friend is giving me his 3" DP. Hopefully that'll clear up these issues, and probably kill some KR too.