XDP OER Series Fuel Return Line Assembly 2011-2016 GM 6.6L Duramax LML/LGH Work Lights These injectors are designed for

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XDP OER Series Fuel Return Line Assembly 2011-2016 GM 6.6L Duramax LML/LGH Work Lights These injectors are designed forXDP Model XD607 Restore the fuel system in your 2011 2016 GM 6. 6L Duramax LML LGH with the OER Series Fuel Return Line Assembly XD607. If you have dealt with a CP4 pump failure, debris and contamination have most likely worked their way throughout your fuel system. When these metal shavings and other contaminants gets in the return line it can block the regulator and prevents adequate return fuel pressure. In the event of a failed CP4, it is