Originally Posted by BootsJunkie
All I'm seeing is the valve relief cutout in the top of the piston (fingernail looking), which is normal. Is this what you're talkin about?
Other than that, MAYBE some carbon build-up, and depending on your mileage is also normal.
I am looking at the small depression just to the left of that. 60k on the engine, plugs look nasty and gapped wide.