This is the TeamGoNads Billet Aluminum Spark Plug Cover (Silver) for the HPI Baja 5B buggies.

The TGN billet spark plug cover cures two common problems found with the stock part. First they moved the wing forward a bit and cut a radius in it to allow you to use a deep socket or the stock plug wrench to remove the spark plug. This is handy for several reasons, but mostly so you can test and tune your carb settings by checking your spark plugs condition while still having roll over protection. The second is that it being made of solid billet aluminum it’s stronger and will hold up to more abuse and will not fold or cave it like the stock plastic piece.