Part Number: 11-0210 Manufacturer: Replica UOM: 1 - KIT Summary:Replica style 3-3/16" bore piston set has a 9:1 compression ratio and is oversize .020. 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. Size: 1000 cc Fitment: XL 1972-1985 Country of Origin: Imported