Circle D Pro Series Torque Converter - N54 N55 S55 ZF 6HP28/6R80 Hybrid Builds w/6R80 Input Shaft configuration ONLY. NOT compatible with OE 6HP28 or any other 6HP variants. Dimensionally similar to BMW 6HP21 N54/N55 Torque Converter. Fill out our Custom CDS Converter Spec Forms. Consult with us before purchase. HERE - for Daily Driver, Street, Strip.  HERE - for Drag Race ONLY (This Torque Converter is ONLY Compatible with our 6HP28 Adapter Kits & 6R80 Hybrid Built Transmission)