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The OS Giken R3C 26-spline center hub clutch housing is a universal service component sized for R3C-series assemblies that use a 26-spline center hub. It provides the structural interface for multi-plate clutch setups and is intended for builders or installers assembling compatible OS Giken clutch packs. The housing wording reflects its role as a direct mechanical replacement in 26-spline R3C configurations.
OS Giken Universal R3C 26 Spline Center Hub (18-A)
