• Color: Black
• Size: 107" to 124"

The S&S Cycle Big Bore Kits for Milwaukee-Eight engines are designed to deliver outstanding performance with stock cylinder heads. These kits allow you to upgrade from a 107" to 124" or a 114" to 128" displacement without the need for complex machining or case splitting, making installation straightforward. The cylinders are made from high-quality aluminum castings with cast-in iron liners for durability and reliability. Each kit includes everything needed for assembly: cylinders, forged pistons, rings, and a complete set of gaskets (head, base, and exhaust). The bore size is 4.250", and the pistons achieve an 11:1 compression ratio, delivering a significant boost in power and performance. The kits are available in a wrinkle black or black granite finish, with optional highlighted fins for a customized look. This bolt-on solution represents the largest bore upgrade possible without requiring additional machining. However, it is essential that installation is performed by a skilled technician to ensure proper clearances and assembly specifications.