Sonnax turbine hub GM-HTCM-37 adapts front-wheel drive GM 245mm cores for use with applications that use a GM 298mm. When used in Sonnax performance converter kit GM-RK-12, this makes for an easy-to-assemble kit.
GM-HTCM-37 does not fit any stock applications, it is only for use with Sonnax performance converter kit GM-RK-12.