Misfire after header install

[S550.chrxs]

Hey, so recently I got a set of BBK Longtube 3/4th headers installed, the car was running fine and sounded great, take it out later that night on the highway, placed the car on track mode and did a slight pull when the check engine light flashed and disappeared, checked the codes on my Ngauge and it read multiple misfires detected, cleared the code that same night, the cars been running fine and idles around 750-800 but it was like this before when I tuned it, code hasn’t came back since but it’s still on the back of my mind, this happen to anyone else ?

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[silverbullet85]

Check to see if your o2 wires shorted or melted on the exhaust.