John, it sounds like you had a run-in with the silicone valve cover plug, huh?

Guys, be VERY careful when removing the stock uppipe. The heat shielding around it can knock a small plastic plug into the valve cover... then you'll need to take it apart, clean it, replace the seal (I didn't, but you usually do), and silicone seal it all back up.

Just DON'T yank it out, ok? And before you take the pipe out, make sure to feel up along the side of the cover so you know where that plug is.