Hey guys, i have recently been trying to figure out whats going on with my car and i cant seem to find the solution. the start of the story is the car has been running really well and i dropped it off to get detailed before a show and i received a call a few days later informing me my car started to misfire and we thought maybe he got something wet and caused it, we let it sit for a few days and when restarted it ran great but after 5 min it would run rough again. we then did notice the pre cats had a discoloration on it and we figure out the cat had gave up and was clogging bank 2. i then removed the headers and gutted them out and had a mechanic look into things for me and test things, we checked all the coil packs and they came back good, checked 02 sensors and where good, did a oil change, cleaned the maf sensors, new plugs, new valve cover, timing cover and some o rings that where creating a little oil leaks. i got the car back and it was running great, sounded great etc. the next day i drove the car about 40 miles to a event and on my way home in traffic the car started to miss again and just seemed so random because it was running so well. after i got it home i ran my obd2 reader on it and came up with these codes p0300 p0308 p0306 p0305 p0307 p1675 p0432 p0422 p0130 p1674 i have a list of the trouble codes and the first 5 are related to misfires and the cylinders, i did notice its the cylinders on bank 2 cylinders 5-8 and wonder if that has anything to with figuring out the issue, my car has no pre cats or cats so there are emission codes on here. anyone have any insight on what might be going on where maybe i should start looking/ testing? any help would be grateful.