Sonnax chromoly turbine hub BW-HTCM-19HS with hardened internal spline replaces those found in Sonnax performance kits BW-RK-2A and BW-RK-3 for Chrysler A618, 47RH/RE, 48RE (310mm) performance converters. BW-HTCM-19HS replaces (and is interchangable with) previously offered BW-HT-19HS.