Have you checked the plugs?

At the same time check the wiring of the plug wires. Did you remove more than one at a time?

I haven't checked the plugs yet. I was going to wait til I got my exhaust done, because I have new plugs, wires, etc... that I'm going to put in. My car does shake/vibrate (not excessively) when I'm driving at high speeds. Maybe I should check/change my coil packs too huh?

A online auto parts company mixed up my order and now is sending me a extra dynomax muffler and denso o2. So if anyone is in need of one just pm me.