This is a printable pushrod for ericthepoolyboy's ls3 engine. You can 3d print this instead of having to buy the steel ball and m3 rod, each one is only about a gram with 100% infill.
Will require cutting the tiny little side supports off/sanding a bit in post processing (they are just to stop it from wobbling while printing) The pushrod slides through into the lifter with the ball part fitting up inside the lifter and glued together.
The author marked this model as their own original creation.