Mercedes-Benz M177/178 Test Plugs

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The AGA Mercedes-Benz Test Plug Kit (part # AGA-MB-M177-178-TP) fits the M177 and M178 engines. This Test Plug Kit includes two plugs that are installed into the turbo inlet side o f the vehicle. One plug is connected to the smoke/test machine through the 1/4" NPT fitting and the other side is fitted with a ball valve to open and close the system. Show more