So after installation of my BBK LT Headers, Catted X-Pipe, my car would drop the rpm low about 450RPM then jump to 650 then 450 and back and forth for a couple times before the car like fixes itself. It gets so low the car shakes and feels like it's gna die on me. I got a tuner and tuned it properly and yet the rough idle problem is still there. It's not as bad and gets fixed sooner but still there. I went into the tuner and changed the idle rpm to 750 to try and fix it. It's better but yet again still the problem persists. I'm going to call Bamma tomorrow and hopefully they can fix my problem. Has anyone else encountered this issue with the headers.