Return Fuel Pressure Test Port for 2011-2016 LML Duramax Fleece Performance MERCHANT AUTOMOTIVE If this is the case

If this is the case the

Stock appearing drop in turbo

Replaced Rail Connections/Thru-Rod/Nuts/Belleville Washers

Durable XLPE Construction Protects From Impact

Return Fuel Pressure Test Port for 2011-2016 LML Duramax Fleece Performance MERCHANT AUTOMOTIVE If this is the caseThe return fuel pressure test port for the 2011 2016 LML Duramax is designed to aid the technician in troubleshooting return fuel pressure, often necessary when diagnosing CP4 pump failures. When installed in the return fuel system, it allows for a pressure gauge to be connected to the return return fuel side to monitor pressure. Fits: 2011 2016 LML Duramax