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ECUMasterCAN bus Expansion Module The ECUMaster CAN bus expansion module plugs into the 5 pin serial port on the standard EMU and adds the capability to communicate over CAN bus, as well as adding 4 analog inputs. CAN bus allows for communication with other expansion modules, aftermarket racing dashboards with CAN bus, many factory gauge clusters, and aftermarket gauges such as the BTI CAN gauge. Features Allows serial 5-pin EMU to communicate over CAN bus Applications Universal What’s In The Box? (1)Adapter Module and Wire Warranty Manufacturer Standard Warranty