5.7GiE-300-R; 5.7GXiE-320-R Ignition Stand-alone HCU and Cables 5.7GiE-300-R, 5.7GXiE-320-R Parts on group Stand-alone HCU and Cables: Pos. Part No Qty Parts name Comments 1. 21520222 [1] Control unit HCU, Replaced by next part number 1. 21847518 [1] Control unit HCU, Replaced by next part number 1. 22296662 [1] Control unit HCU, Replaced by next part number 1. 22498021 [1] Control unit HCU 2. 21460908 [1] Converter Parts catalog : Electronic Engine Control 5.7GXiE-320-R Electronic Engine Control 5.7GiE-300-R Ignition 5.7GiE-300-R, 5.7GXiE-320-R