Part Number: 11-1011 Manufacturer: Wiseco UOM: 1 - KIT Summary:Big Bore Wiseco reverse domed piston kit for use with standard 3.875" bore cylinders with 9:1 compression. Kit includes forged pistons, rings, circlips, chrome piston pins and gaskets. **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. Fitment: FLT 2007-UP FXST 2007-UP FLST 2007-UP FXD 2007-UP Country of Origin: USA