Milwaukee Twins OEM-Style Clutch Hub For Harley Big Twin The Milwaukee Twins OEM-Style Clutch Hub for Harley features an upgraded design, combining a machined steel center with an aluminum outer splined ring. These elements are securely fastened by allen screws and welded steel studs, ensuring durability and reliability. It incorporates a reinforced insert to enhance longevity and seamlessly accepts all OEM components. Engineered for superior performance, it keeps your Harley's clutch functioning smoothly. Formerly offered under the J&P Cycles brand. Features: Features the updated OEM construction which has a machined steel center with aluminum outer splined ring, secured by allen screws, with steel studs welded in place Improved inner clutch hub with reinforced insert Accepts all OEM components Replaces OEM 37550-98