Part Number: 11-0314 Application: 1941-1977 FL1971-1977 FX Details:Piston set 3-7/16 bore .070 oversize with compression ratio of 7.5:1. Set includes Hasting 3 piece rings 2 wrist pins and 4 circlips. Pistons have a steel expansion control strut. **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.UOM: KIT Country of Origin: USA