Bore: Bore Not AvailableCompression: 8.5:1 CompressionSizing: 0.020in. OversizeForged piston crown with generous valve pockets for big valves and cams. Precision-fit rings selected for each application for ultimate sealing. Force-fed pin oiling provides enhanced lucubration of the piston pin. Pressure seal groove reduces ring lifting and power loss. ArmorGlide skirt coating reduces friction, providing quieter operation and improving scuff resistance. Valued-packaged with two pistons, rings, piston pins and circlips. Made in the U.S.A.. For 84-99 Evolution 1340cc 80 Cu. In. (Flat Top) X-ring Package (8.5:1 Compression/9.5:1 Compression w/ Screamin Eagle Heads)This item fits the following vehicle applications:compatible with Harley Davidson FLHR Road King 1994-1998compatible with Harley Davidson FLHRCI Road King Classic 1998compatible with Harley Davidson FLHRI Road King 1996-1997compatible with Harley Davidson FLHT Electra Glide Standard 1995-1998compatible with Harley Davidson FLHT Electra Glide Standard 1986-1987compatible with Harley Davidson FLHTC Electra Glide Classic 1984-1998compatible with Harley Davidson FLHTCI Electra Glide Classic 1996-1998compatible with Harley Davidson FLHTCU Electra Glide Ultra Classic 1989-1997compatible with Harley Davidson FLHTCUI Electra Glide Ultra Classic 1995-1998compatible with Harley Davidson FLST Heritage Softail 1986-1990compatible with Harley Davidson FLSTC Heritage Softail Classic 1988-1999compatible with Harley Davidson FLSTF Fat Boy 1990-1999compatible with Harley Davidson FLSTN Heritage Softail Nostalgia 1993compatible with Harley Davidson FLSTN Heritage Softail Special 1994-1996compatible with Harley Davidson FLSTS Heritage Springer 1997-1999compatible with Harley Davidson FLTC Tour Glide Classic 1984-1991compatible with Harley Davidson FLTCU Tour Glide Ultra Classic 1989-1995compatible with Harley