Forged Diesel Stainless 9th Injector Return Plug w/ O-Ring

For 2011, 2012, 2013, 2014, 2015, 2016 GM 6.6L Duramax LML

Forged Diesel parts are made with the highest standards to offer the best in quality and affordability.

This plug is used to block the non-utilized fuel return loop specific to the CP4.2, after converting a 2011-2016 LML to a CP3. A CP3 does not support this additional return plumbing. Not sealing this portion of the return off may result in a return fuel leak, hard starting or poor performance.

Replaces# 1-018-342, ZZ-480