HI GUYS I JUST HAVE A FEW QUESTIONS ABOUT A REBUILD I'M DOING, I WASN'T SURE ABOUT THE S ON THE TOP OF THE PISTON W/ A ARROW, I THINK THAT IS MEANS SOUTH, OR INTAKE SIDE FACING, CORRECT ME IF IM WRONG. ALSO THE PISTON PIS CIRCLIPS IS THE ANY SPECAIL WAY THEY NEED TO ME FACING