Link ECU XS Expansion Loom (XSL) (Order in)Link ECU XS Expansion Loom (XSL) *NOTE* This product is Order in and typically takes around a 4 5 working days to get in to stock Want to add additional inputs output to your Link Plugin ECU? Use the XS Loom. The Link XS Loom plugs into the expansion connector on all Link G4, G4+ and G4X plug in ECUs. The number of extra inputs and outputs added by the XS Loom is dependent on the Plugin ECU. For specific details check the plug in ECUs specifications.