Replica style 3-3/16 inch bore piston set has a 9:1 compression ratio and is oversize .010. Piston set alloy is cast in a permanent steel mold and includes rings. **Note: Run engine at moderate speeds for at least 500 miles avoiding excessive running in lower gears in order to properly break-in new pistons and rings. FITS HARLEY: 1972-1985 XL,
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Replaces OEM:
Made in: TAIWAN
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