Some of yall may remember a while back I posted a picture of this cylinder head I was working on. I didn't have the piston in the shop at the time, but I did have one the other day and figured I would share it.
Here's the head again. This is actually the bottom half of the head. You can see the packing case on the top in the center that seals around the rod.
And here's the piston. It's not supposed to be that color. They are made out of aluminum, so they are usually a shiny metallic color. This one is brown because the mechanic on site put the exhaust valves where the intake valves should have been.
On a side note, this is what happens to a similar size piston (17" diameter) when fluid gets in the cylinder with the pistons running between 900 and 1200 RPMs.