4 1/8" Bore Cylinder & Piston Kit For Early Production T111 Engines For 1999-2006 Big Twins - Wrinkle Black Powder Coat FInishThis 4 1 8" bore cylinder and piston kit replaces the cylinders and pistons on early production S&S T111 engines for 1999 '06 big twins. The kit contains S&S 4 1 8" bore cylinders, forged pistons, rings, wrist pins, head and base gaskets. Pistons are flat topped design intended for use with S&S Super Stock cylinder heads. The cylinders are machined with the S&S bolt pattern and are intended for use in S&S crankcases used in early S&S T111 engines.