CAN Bus Y-splitter Fits Holley EFI, Sniper, Terminator X, Dominator Replaces 558-465 CAN Bus Y-splitter for Holley EFI, Sniper, Terminator X, Dominator replacing 558-465 allows you to add an additional CAN device to your Sniper EFI or Terminator X installation, without needing to unplug the handheld. This easy to install CAN splitter simply plugs into the CAN connector on your main harness, then allows you to plug in any Holley EFI CAN device, such as a Digital Dash, or USB to CAN communication cable.