Part Number: 11-0207 Manufacturer: Replica UOM: 1 - KIT Summary:Replica style 3" bore piston set has a 9:1 compression ratio and is oversize .070. 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: 900 cc Fitment: XL 1957-1971 Country of Origin: Imported