Pipe outers look stock. Any mods to pipes, ECU or airbox?
Twin plug heads with super revenge death berserker, multi point, large flame kernel plugs are clearly too much of a good thing.
Consider an ECU remap if your tune is on the EPAish lean side. Ethanol in fuel leans things out a little more too, so your stock tune could be marginal and a bit fragile in the face of introduced factors.