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Some piston designs are symmetrical, and can be installed in any bore, while others with offset pins or asymmetrical valve clearance pockets or domes may only be oriented correctly in specific holes. Positioning can be determined by looking at how the dome or valve notches fit the cylinder heads, while offset-pin flat-tops are usually marked with a notch or arrow indicating the front. Number each piston to a corresponding cylinder with an arrow to indicate the orientation in the bore. View Related Article
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