124" Twin Cam 4-1/8" Big Bore Kit - Replacmnt Rings 4-1/8" Br Std.

Replacmnt Rings 4-1/8" Br Std.

The S&S Cycle 124" Twin Cam 4-1/8" Big Bore Kit is designed as a replacement for the cylinders and pistons in an S&S 124" Hot Set Up Kit, a T124 T2 engine, or as a foundation for a new engine build. It includes 4-1/8" bore cylinders with a durable wrinkle black powder coat finish, forged flat dome pistons, rings, wrist pins, head gaskets, and base gaskets. The cylinders feature a stock bolt pattern and are designed for use in stock crankcases of 2007-2016 Harley-Davidson Big Twin engines. This kit must be paired with 4-5/8" flywheels to achieve 124" displacement and can be used with stock or S&S cylinder heads. For optimal performance, upgrades to camshafts, air intake, exhaust, and fuel system tuning are recommended. Replacement ring sets are available separately and are designed exclusively for S&S pistons.