Up for sale is KB PISTONS 1999-2006 FLTR Road Glide Harley Davidson CAST PISTONS TC88 TO 95CI 9.3:1 STD. The vendor part number is KB348.STD. Please read the title to know what is for sale KB Hypereutectic alloy pistons are cast with a 16% high silicon content that has very high thermal barrier properties along with a low thermal expansion rate, allowing tight piston to cylinder wall clearances. This makes them ideal for air-cooled engines, offering optimal ring seal, quieter engine running and reduced wear. Hypereutectics are best suited for stock or mild compression ratios up to 10.5:1 running on pump fuel.