3-5/8" bore cylinders with pistons for 1984–99 big twin models with 98" engines and stock style cylinder heads. The low silicon forged piston allow closer fit, quiet operation, and long engine life. Natural or wrinkle black powdercoat finish. Flat topped pistons for stock style heads. Pistons included.
Natural. . . . 91-7302
Black. . . . .91-7802
NOTE: Stock cases must be bored to accept larger cylinder spigot.
