That is a stock syty. Piston The piston is a dish piston with valve reliefs
Sorry to tell you but that is a dished piston also with valve reliefs
Here's a pic of a non-dished piston I found in my block when I bought it!!!!!
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Not sure if you were refering to my pic or not, but mine is dished a bit, but nowhere near as much as a stock syty piston is. The pic is somewhat deceiving in that it makes it look more dished than it is.