2011-2016 Duramax LML Return Fuel Pressure Test Port (FPE-FPTP-GM-1116) L86 5 inches with crushed bent

5 inches with crushed bent corners and flimsy plastic components

7L P1 4" Downpipe Back Exhaust - No Muffler (C6292SLM)

*Or a 37" with additional fender and front bumper clearance required

4L King CP-Series Main Bearings Set (MB5736CP)

2011-2016 Duramax LML Return Fuel Pressure Test Port (FPE-FPTP-GM-1116) L86 5 inches with crushed bentThe 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